A Taxonomic Revision of Deutzia (Saxifragaceae, s. l.) in the Ryukyu Islands, S Japan

12 Pages·1992·1.2 MB·English

by  Hideaki Ohba

植物研究雑誌
J. Jpn. Bot.
67: 154-165 (1992)
A Taxonomic Revision of Deutzia (Saxifragaceae，s. 1.)
，
in the Ryukyu Islands S Japan
Hideaki OHBAa a nd Shinobu AKIYA MAb
aDepartment of Botany，Un iversity Museum，Un iversity of Tokyo，
7-3-1 Hongo，T okyo，1 13 JAPAN;
bBotanical Gardens，Fa culty of Science，Un iversity of Tokyo，
3・7-1 Hakusan，B unkyo・ku，Tokyo，11 2 JAPAN
南西諸島のウツギ属植物の分類学的再検討
大場秀章a，秋山忍b
a東京大学総合研究資料館生物系研究室
東京大学理学部附属植物園
b
(Received on May 11，1 991)
Deutzia described and recorded from the Ryukyu Islands including the Amami group is revised
taxonomically. Morphology of indumentum，f lowers and leaves is observed. Chromosome numbers
are counted. The insular Deutzia classified into two species and av ariety; Deutzia yaeyamensis，
D. naseana，D . naseana v amanoi.D. yaeyamensis is diploid while D. naseana and var.
訂
amanoi etetraploid. The presence of tetraploid is reported from Deutzia for the first time.
訂
The genus Deutzia Thunb.，co nsisting of about Oshima) while Takuno-sima is Tokunoshima. In
50 species，is one of the representative genera their flora of the Ryukyu Islands Ito and
distributed disjunctively in eastern Asia (Himalaya Matsumura (1899) listed D. scabra based on Forbes
to Japan) and N America (Mexico). Zaikonnikova and Hemsley (1887) who cited the collections by
(1966) recognized 55 species classified泊3sections， Carpenter as well as Wright.
6 subsections and 16 series. According to her Nakai (1935) described Deutzia naseana from
system the species distributed in the eastern margin Amami-Oshima but he did not give any comment
of the Asian continent from Luzon to Hokkaido about Wright 93 and Carpenter neither did the
through Taiwan，R yukyu and other islands are all occurrence of D. scabra in the Ryukyu Islands.
classified in the section Deutzia subsect. Deutzia. Zaikonnikova (1966) classified Jtケight93 into two
Maximowicz (1867) cited Wright 93 collected varieties of D. scabra，v ar. petiolata and var.
o
from ‘U- sima et Takuno-sima' under Deutzia latぴ，ifα.Ohwi (1938) described D. yaeyamensis
scabra. This is the first record of Deutzia from from Iriomote Island. Hatusima (1954) published
the Ryukyu Islands.‘U-sima' is am isreading of D. amanoi endemic to Okinawa，b ut later he
Wright's handwriting ‘Ousima' (= A mami- regarded it as one of the varieties of D. nαseαna
-154ー
June 1992 Journal of Japanese Botany Vol. 67 No. 3 155
together with var. macrantha (nom. nud.) from number of the rays per hair is slightly different
Tokunoshima (Hatusima 1971). between D. yaeyamensis and the others. The rays
Totally four species and several varieties have in D. yaeyamensおaregenerally four to sIx and five
been described or recorded from the Ryukyu in abundance while those in D. nαseana and D.
Islands including the Amami group. This paper αmanoi are four to six or rarely more and usually
aims to review these species and varieties. SlX.
Stellate-pubescent also appears densely on the
Materials and methods calyx. The hairs are conspicuously warty. The hub
Materials studied were obtained from the field is larger than that of leaf surfaces and the number
and the herbaria. They are listed in this taxonomic of rays is nearly twice of that on leaves，u sually
treatment. The indumentum was observed with a 10 to 13.
Hitachi S-700 scanning electron microscope at 5 Deutzia scabra var. petiolata and var. latifolia
kV. Samples taken from herbarium specimens were are identical with D. naseana in the nature of hairs
mounted on alminium stubs and coated with gold and the number of rays.
岨
palladium. The materials for cytological observa- Flowers (Figs. 2，3). In D. naseana the flowers
tion were collected in the field in 1987 and 1989， noticeably varies in size but the variation is con-
and transplanted to ag lass house in the Botanical tinuous and lacks significant difference among
Gardens，Un iversity of Tokyo，T okyo. The root- islands. Var. macrantha Hatusima ex H. Ohba
tips were collected from them，a nd fixed with the described from Tokunoshima is the only represent-
solution of 3: 1 alcohol-acetic acid after the ative having relatively large flowers distributed in
p阿佐eatmentwith 0.002 M 8-hydroxiquinolin solu- Tokunoshima and Amami-Oshima.
tion for about 3h rs. The maceration and staining Differences in flowers are found in the petals
were carried out simultaneously in mixed solution and filaments. The shape of petals is slightly
of 9:1 2070 acetic-orcein and lN-HCl for about 24 different between D. yαeyαmensis and others.
hrs and then squashed. Flowers were dissected and Petals of D. yaeyαmensis are oblong oblanceolate
drawn with ac ameralucida. or oblong but rarely elliptic while in D. naseanα
andD.αma noi they are usually narrow ovate or
Observation broad lanceolate (Fig. 2). The two varieties of D.
Indumentumσig. 1). All the species of Deutzia scabra have oblong or oblong-oblanceolate petals.
are stellate-pubescent on both surfaces of leaves， The stnensare arranged in two whorls in
出
petioles，pe dicels and calyx-tubes. The stellate hairs which the outer ones are longer than the inner ones.
consist of as hort stalk slightly arising from the The filaments of Deutzia are winged and in some
epidermis，a nd equipped with four to six (rarely species have teeth at the distal end of the wing. The
nine or more) unicellular tapering rays extending prenceof teeth is not constant in D. nαseanαand
回
horizontally from ar aised hub. The shape of hub D.αmanoi varying from all of the filaments
resembles shallow-cone. The ray and hub are dentate to aU those toothless. In D. yaeyamensis
sparsely warty with smooth rounded minute pro- the filaments are usually toothless and with wings
]ections. tapering towards the apexσig. 3). The degree of
The hairs on both upper and lower surfaces of dentition in D. nαseαnαis not different between
leaves are identical in shape and size，ho wever the Amami-Oshima and Tokunoshima. Deutzia
156 植物研究雑誌第67巻第3号 平成4年6月
Fig. 1. Stellate hairs on lower surface (a-d) and upper surface (e) of leaves and calyx-tube (η
of Deutzia. a: D. yaeyamensis. b: D. naseanαvar. amanoi. c: D. naseana. d: D. faberi. ea nd
f: D. naseana. Bars except ea re 50μm; e5 00μm.
n
1\(j
b
ad d
Fig. 2. Calyx-lobes (above) and petals Cbelow). a: D.
naseana from Amami-Oshima (Ohba and Akiyama
8903052). b: D. naseana from Tokunoshima (Ohba and
Akiyama 8903019). c: D. nαseana var.αmanoi
(Nacejima s.n.). d. D. yaeyamensis (お1itsutaand
Nagamasu 535). x3.
June 1992 Journal of Japanese Botany Vo1. 67 No. 3 157
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Ul(六日UハハハハハハγUハハ11UUハハハハuQ内川Uluハγ門πluハUパU八日 ハハハリハ〕IHHUハハハハハU1ハハハハハUハハハ1Uハハハハハ川。八ハハUυ八ハハハハ(γ 日ハハ川ハハOHU(}ハハハハハUυ。日ハハハハ
Fig. 3. Stamens of Deutzia. a-h: D. naseana. ian d j: D. naseana var. amanoi. k d :1
佃
D. yaeyamensis. x3. a-d. from Tokunoshima (a. Ohba and Akiyama 8903019，b.
8903021，c. 8903020，d. 8903016)，e- h. from Amami-Oshima (e. Ohba and Akiyama
8903053，f. 8903059，g. 8903071，h. 8903052). i. Tawada s.n. j. Nacejima s.n. k. Sonohara
114. 1. Mitsuta ahd Nagamasu 535.
αmαnoi has same tendency of dentition to that of yαeyamensis while semi-oribicular to ovate in D.
D. naseαna. naseana and D. amanoi.
The two varieties of D. scabra seem to share Leaves (Fig. 4). In D似たαinaseαnathe leaves
the variation ranges with D. naseαna也theshape are ovate to lanceolate or oblong ovate while in
and dentition of the filament as well as the shape D. yαeyamensis usua1lyb road lanceolate to ovate.
and size of the petal. In the variation range of leaf size D. naseana is
Calyx-lobes are persistent even in fruiting s回ge 0b viously wider than D. Yαeyαmensお. In D.
in all the Ryukyu species，a nd triangular加 D. naseana the variation is continuous and does not
158 植物研究雑誌第67巻第3号 平成4年6月
analysis has not been done，t he chromosome
width
• complements are not greatly differentiated in shape
• • and their size.
・••
23， そ
.
5 1， ~~':ミ!・'.・・.・. Discussion
3d(> C~F - The two varieties of D. scαbra have no
• difference from D. nasean仏 andundoubtedly fall
in the latter's synonymy. Deutzia amanoi is hardly
。 different from D. naseana in all the characters
length
5 10 examined as well as in ploidy level. Though
Fig. 4. Variation of the length and width of the largest Hatusima (1954) described the filament of D.
leaves in flowering shoots in D:e・utzia naseana. ~砂: amαnoi as dentate，th e dentition is variable such
Tokunoshima (1: Type of D. scabra var. petiolata，2:
Type of D. scabra var. 1αtifoliα). Amami-O shima. as in D. nαseαnα.D eutziααmαnoi is，th erefore，
，
0: Kikaigashima.ム:Kakeromajima.企:Okierabu- regarded as al ocal variety of D. naseana merely
shima.
with ad warf body growing on windswept rocky
places in Okinawa.
show any tendency to differentiate田nongislands Zaikonnikova (1966) classified Deutzia naseαna
，
(Fig. 4). The leaf size of D. amanoi fa11s in the in series Pulchrae with D. pulchra Vidal，D .
variation range of D. naseanα. The leaf size of the crenata Sieb. et Zucc.，D . glauca Cheng and D.
two varieties of D. scabra coincide with this range， ningpoensis Rehder，wh ereas D. yaeyamensis was
and not different from those of D. naseana in placed in Ser. Scabridae with D. taiwanensis
texture and shape. Leaves of D. yaeyamensおare (Maxim.) K.C. Schneider，D . scabra Thunb. and
apparently thinner than those of D. naseana. D. Faberi Rehder. The Scabridae differs from the
Chromosome numbers σig. 5). Chromosome Pulchrae by the sessile or nearly sessile leaves on
numbers of the Ryukyu Islands species are first flowering shoots，t he small number of rays in
reported (Table 1). 2n =2 6 chromosomes were stellate hairs，th e persistency of calyx-lobe and the
ob served in D. yαeyamensis while 2n =5 2 in D. wingless of seeds. However，D . yaeyamensis has
amanoi and D. naseanaσig. 5). Though karyotype apparently petiolate leaves on flowering shoots.
Fig. 5. Chromosomes in Deutzia naseanα(right)，D . naseana var. amanoi (middl吋andD. yaeyamensis (le白).
Bars= 10μm.
June 1992 Journal of Japanese Botany Vol. 67 No. 3 159
Table 1. Chromosome numbers of Deutzia and the voucher data.
Chromosome
Taxa Voucher data
numbers (2n)
D. naseana var. amanoi 52 Isl. Okinawa，S ashiki.
D. nαseαnα 52 Isl. Amami-Oshima，S umiyou.
D. yaeyαmensis 26 Isl. Iriomote，M ayagusuku.
Moreover，Fu ruse 3949 (URO)，w hich is the only conspicuously dentate filaments separates D.
representative specimen of fruiting stage，h as crena似 fromD. naseαna and D. yaeyamensis.
ellipsoidal seeds with al ittle extention towards both It is significant that chromosome numbers are
ends as those of D. naseana. Ohwi's (1938) different between D. yaeyamensis and D. nαseana
‘seminibus…vix appendiculatis' might be based including D.αmαnoi. As the basic number can be
ont he inmature seeds in flowering stage of the type estimated as x= 1 3 from the previous records，D .
specimen. The calyx-lobes of D. naseana is per- yaeyαmensお with2n =2 6 is diploid while D.
sistent in fruiting stage. The number of ray in naseana and D.αmanoi with 2n =5 2紅etetraploid.
stellate hairs almost overlaps among those species. This is the first record of the tetraploid in Deutzia
From these D. yaeyamensis is undoubtedly most though hexa-，o cta-and decaploid have been
close to D. naseana，a nd these circumstances reported.
demand the revision of Zaikonnikova's series rank
classification. Key to the species and the varieties
Deutzia faberi described from Kiangsu Hills， 1. Filaments usually toothless，7 -8 mml ong.
Chekiang，E China，is closely related to D. naseana Calyxlobestriangular，re flexed in fruiting. Leaves
副
and D. yaeyamensis，f rom which this differs by the thin herbaceous. Petals ascending at flowering，
sessile leaves and the stellate hairs with as ingle oblong-oblanceolate or oblong，r arely elliptic.
consicuously long ray (Fig. 1). Deutzia taiwanen- 2n =2 6 .................... D. yaeyamensis
sis greatly differs from D. naseana and D. yaeya 1. Filaments usua11y both dentate and toothless in
四
mensis by the more or less incised petals，t hree as ingle flower，4 -6 mml ong. Calyx-lobes semi-
styled ovaries and completely winged filaments. orbicular to ovate，er ect in fruiting. Leaves thick
Deutzia scabra is different from them in the herbaceous. Petals more or less spreading at
number of rays of stellelate hairs，3 o r 4，o n the flowering，us ually narrow ovate or broad lanceo-
lower surface of leaves，a nd moreover from D. late. 2n =5 2 ................. D. naseana; 2
naseana by the toothless filaments and from D. 2. Inflorescences with 3t o 7f lowers. Leaves 2-3
yaeyamensis by the broad ovate or orbicular sessile cm long with round apex .. . . . .. var. amanoi
leaves in flowering shoots. Cytologically D. 2. Inflorescences with 25-30 flowers. Leaves
naseana and D. yaeyαmensis are different from D. usually longer than 3c m with acute，o btuse or
scabra and D. crenαta with 2n =1 30 (cf. Fedorov round apex .. . . .. . . . .. . . . . . . .. var. naseana
1969). Chromosome numbers of D. tαiwanensis
and D. faberi are sti11 unknown. Itsc ompletely and
160 植物研究雑誌第67巻第3号 平成4年6月
Taxonomic treatment 64: 324 (1989); in Sataka et a ，.lWild Flow. Japan，
1) Deutzia naseana Nakai inBot. Mag. Tokyo 35: Woody Pl. 1: 175 (1989)，c um var. macrantha
88 (1921) -Zaikonnikova，M onograph 52 (1966) (nom. nud.) and amanoi (comb. nudふType:Nase
一 Hatusima，Fl. Ryukyu 304 (1971) -Walker，F .l insulae Oshima (S. Yajima s.n.，TI ) (cf. Ohba and
Okinawa 514 (1976) -Ohba H. in J. Jpn. Bot. Akiyama 1990，p l. 85).
Fig. 6. Types of Deutzia scαbra Thunb. var. latifolia Zaikon. and var. petiolata Zaikon.
June 1992 Journal of Japanese Botany Vol. 67 No. 3 161
D. scabra auct. non Thunb.: Maxim. in Mem. orbicular to ovate，a pex round or round with a
Acad. Sci. St.-Petersb. 10 (16): 24 (1867)，p .p.， short mucro. Petals milky white，10 --11 mml ong，
cit. Wright 93 ex U-sima et Takunosima- 4-5m mw ide，u sually narrow ovate or broad
幽
Forbes et Hemsl. in J. Linn. Soc. Bot. 23: 276 oblanceolate，ap ex round，m ore or less spreading
(1887)，p .p. -Ito et Matsumura，T ent. Fl. at flowering. Stamens 4-7 mml ong，a pparently
Lutchu. 196 (1899) -Zaikon.，M onograph 34 shorter than the petal，fi laments white，be low 4/5
(1966)，p. p.，in cl. var. petiolata et latifolia. winged，t he upper end of the wing extending
D. scabrlαvar. petiolata Zaikon.，M onograph horizontally (dentate) or tapering; anthers orbicular
34 (1966). Type: U-sima et Takuno-sima or broad ovate， 1-1.2 mm long， before
(= A mami-Oshima and Tokunoshima) (C. Wシight dehiscence deep yellow. Styles 3，6 -9m ml ong，
93，a p art [right ，]LE)σig. 6). erect at flowering，st igma oblique. Disc circular，
D. scabra var. αiltifolia Zaikon.，M onograph 37 deep yellow. 2n= 52.
(1966). Type: U-sima et Takunosima(= A mami- Distr. Amami Group of the Ryukyu Islands:
・
Oshima and Tokunoshima) (C. Wright 93，a p art Amami-Oshima，• Kikaishima， Kakeromajima，
[left]，L E)σig. 6). Tokunoshima and Okinoerabushima.
D. naseana var. macrantha Hatusima [Fl. Specimens examined. Iles Liu-Kiu (Ferrie 14 in
Ryukyu 304 (1966)，no m. seminud.，c um descript. 1895-96，A ).
Jap. -H. Ohba in Satake et a ，.l Wild Flow. AMAMI-OSHlMA. sine loc. spec. (Warburg
Japan，W oody Pl. 1: 175 (Feb. 1989)，no m. nud.] in 1887，A ; Faurie 3930，K YO; Amano in
ex H. Ohba in J. Jpn. Bot. 64: 325 (1989). Type: May 1956，K AG; Hatusima & Sako 21811，
Amami Group of island: Tokunoshima，Ka metsu KAG); central (Z. Tashiro in Mar. 1924，K YO);
-Obaru (H. Ohba 863078 on 12 March 1986，T l) Kominato (Hatusima & Sako 23366，K AG); Nase
(cf. Ohba and Akiyama 1990，p .l86). (Hatusima & Sako 21850，K AG); Nase -Asani-
Small shrub up to 1 m high，h ornotinus Koshuku (Y. Kimura & 1. Hurusawa Sept. 11，
branches brownish，te rete，wi th dense 3-4 rayed 1940，TI ); Nase -Asato -Kominto (Kimura &
stellate hairs. Leaves petiolate even on flowering Hurusawa Sept. 9-10，1 940，TI ); Naze-shi，n ear
shoots，or bicular -ovate or broadly oblong，4 -8 Sukure-tooge，al t. ca. 400 m (J. Murata 4943，A) ;
cm long，2. 5-4.5 cm wide，a pex acute，ob tuse or Nase (Z. Tashiro Mar. 1924，K YO; Kimura &
round，b ass round，m argin very low dentate Hurusawa Sept. 11，1 940，T I); Naze，K anehisa
throughout，te eth less than 1m ml ong，wh en young (Koidzumi in Apr. 1923， KYO); Koshuku
greyish-green with dense stellate hairs with (Uchiyama Dec. 10，1 900，TI ); Yuwandake (H.
4-5(ーの rayson upper surface，w hitish or pale ItoM ay 7，1 936，T l); loc. cit. (K. Enomoto April
green with (4-)5-6(-9)-rayed stellate hairs on 26，1 969，T I); Toen (Hidekage Ohba in 1923，
lower surface; petioles 5m ml ong or less，de nsely KYO); Yanma，Su miyou-mura，al t. 2m (S. Sako
stellate pubescent. 6046 KAG，K YO，T I); Sumiyou-mura，a long
Inf10rescences paniculate，u sually with 25-30 Sumiyou-gawa (Fukuoka 7909，K YO; M. Sato
f1owers，t erminal and from axils of the upper 4025，KA G); Sumiyou-gawa，ab ove electric power
leaves. Pedicels ca 2m ml ong，st ellate pubescent. station (Furuse 8289，U RO); Sumiyou-gawa
flowers protogynous. Calyx whitish with dense (Furuse 8297，U RO); Sumiyou-mura，Su tarumata
stellate hairs; lobes 1-1.5 mml ong，s emi- (Mitsuta & Nagamasu 1097，K YO); Sumiyou-
162 植物研究雑誌第67巻第3号 平成4年6月
mura，S umiyou woodland path (Mitsuta and TI); loc. ci ，.t near Akitoshigami (Ohba and
Nagamasu 1210，KY O); Sumiyou-mura，Ni shina- Akiyama 8903001，8 903002，TI ).
kama (Hatusima 19914，K AO); Sumiyou-mura OKNOIERABUSHIMA. (T. Amano 6435，A ).
(Ohba & Akiyama 8903053，TI ); loc. cit.，( Ohba In Amami-Oshima and Tokunoshima the plants
and Akiyama 8903052，T I); Sumiyou-mura - which occur on sunny places such as road side
Koniya (0. Koidzumi in May 1923，K YO); Naze banks are at endency to have relatively large
Daiwa (Koidzumi in Apr. 1923，K YO); flowers，wh ile those which occur the margin of
Tatsugo-mura，in terior Oogachi (Iwatsuki 4651， thickets or rocky slopes in water side are small. The
KYO); Okumata，N aze，al t. 10 m. A common flowers have the other tendency to be larger in
shrub 1m height on edge of thicket (S. Hatusima Tokunoshima than Amami-Oshima. In
& S. Sako 21850 on March 26，1 958，TI ); Naze， Tokunoshima the flowers generally come forth in
Todorokinotaki Water Fall (Ohba 863152，1 986， the mid-March but in Amami-Oshima bloom at
TI); Kinsakubaru (Koidzumi in Apr. 1923，KY O); least aw eek later. As mentioned in our discussion
Tatsugo (K. Tsugaru 464，KY O; Ohba &A kiyama var. macrantha was named the specimens collected
8903071，TI ); Setouchi-cho (Ohba and Akiyama from Tokunoshima with such large flowers
8903055-8903060，TI ); Uken-mura，Sh inkogachi (Hatusima 1966，O hba 1989a，1 989b). However，
(Ohba 863111 on Mar. 14，1 986，TI ); Naon，al t. the size of flowers changes continuously from
20 m (Miyagi and Hatusima 40307，U RO). smallest to largest.
KIKAISHIMA. Sine loc. spec. (Hatusima & Though we have had no chance to examine
Sako 23750，K AO; K. Yoshinaga 527，U RO); Carpenter cited by Forbes and Hemsley (1887) and
Kawane (Mimoro，Sh imada & Ozaki 2865，K YO); Itoa nd Matsumura (1899)，D . scαbra is hardly
Kadon (Yoshinaga 1084，K AO). expected to occur in the Ryukyu Islands. The
KAKEROMAJIMA. Adachi (T. 0込ion 30 Apr. southernmost localities of D. scabra are
1980，K AO); Sesoo (Oiji on 1M ay 1980，K AO). Kuroshima，Iw ojima and Tanegashima，wh ich are
TOKUNOSHIMA. Sine loc. spec. (Hidekage all the islands south off the main island of Kyushu
Ohba in 1928，K YO; S. Ohuchiyama on 13 Mar. (Hatusima 1991).
1957，K AO; Miyagi on 24 Dec. 1974，U RO); V amanoi (Hatusima) Hatusima [Fl. Ryukyu
訂.
Kametsu -Ohara (0. Murata 56301，K YO); 304 (1966)，c omb. nud. -H. Ohba in Satake et
Between Kametsu and Nanbaru. On the margin of a ，.lWild Flow. Japan，W oody Pl. 1: 175 (1989)，
thicket (Ohba 863002 and 863032 on Mar. 11， comb. nud.] ex H. Ohba in J. Jpn. Bot. 64: 324
1986，TI ); Omo -Nanbaru (0. Murata 56217， (1989).
KYO); Tokunoshima-cho，in terior of Boma (Iwa- D. amαmoi Hatusima in J. Jpn. Bot. 29: 233
tsuki et al. 465，K YO); Ikema -Mt. Inokawa- (1954) -Walker，F l. Okinawa 514 (1976). Type:
dake (Nagamasu 1729，K YO); Tokunoshima-cho， Isl. Okinawa. Liukiu: Ohsatomura (S. Tawada in
Inokawa (Ohba and Akiyama 8903009-8903026， April 1947，K AO).
TI); loc. cit.，b etween Inokawa and Shimokushi Distr. Ryukyu Islands.: endemic to Okinawa
(Ohba & Akiyama 8903005，T I); loc. cit. Shimo- Island.
kushi (Ohba and Akiyama 8903007，TI ); Amagi Specimens examined. OKINAWA. Shimajiri，
-Kedoku (Ohba and Akiyama 8903051，TI ); Ohsato castle，al t. 100 m. On the cliff of the
Amagi-cho，M ikyo (Ohba and Akiyama 8903036， elevated coral reef (Tawada 5646，U RO); Ohsato
・
June 1992 JournaI of Japanese Botany Vol. 67 No. 3 163
son (A. Takushi on 15 Apr. 1990，TI ); Hatusima ovate leaves of 2-3αn long with round apex and
17780，TI ; 17781，K AG); Sashik .iOn limestone round or broadly cuneate or rarely shallowly
(Yamazaki 320，TI ). cordate base and inflorescences with 3to 7f lowers.
It is av ery small shrub growing on the old stone 2) Deutzia yaeyamensis Ohwi in Acta Phytotax.
wal1 of the ancient castle in Osato，a nd has small Geobot. 7: 135 (1938) -Zaikon.，M onograph 40
Fig. 7. Type of Deutziαyαeyαmensis Ohw .i