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植物研究雑誌 J. Jpn. Bot. 68: 156--158 (1993) Notes of Impatiens from West Nepal Shinobu A阻YAMAaa nd Hideaki OHBAb aBotanical Gardens，Fa culty of Science，Un iversity of Tokyo 3-7-1 Hakusan，B unkyo-ku，T okyo 112，J APAN; bDepartment ofBotany，Un iversity Museum，Un iversity ofTokyo 7-3-1 Hongo，Bu nkyo-ku，To kyo 113，J APAN 西ネパール産ツリフネソウ属植物の研究秋山忍，大場秀章 a b a東京大学理学部附属植物園 112 東京都文京区白山3-7-1 b東京大学総合研究資料館 113 東京都文京区本郷7-3-1 (Received on January 9，1 993) A new species，I mpatiens b可urensis，is described from far west Nepa .lFloral features of I. glauca are described for the first time. According Hara (1979)，1 5 species of Impatiens of Nepal in 1991 (Suzuki 1992)，a nd Drs. Futoshi are knpwn from west Nepal. Among these，1. Miyamoto and Nobuhira Kurosaki have collected racemosa，I. radiata，a nd I. bicornuta are common 50 numbers of Impatiens from this area. Weh ave throughout Nepal without any considerable studied the specimens including bottled flowers， geographical variations. Impatiens racemosa is and recognized 11 species. Impatiens sunkoshien- distributed in Himalaya from Kashmir to Assam sis S. Akiyama，H . Ohba et Wakabayashi is col- and S. Tibet. Impatiens serrata occurs between lected in west Nepal for the first time. Impatiens Kumaon and Bhutan while I. bicornuta Kumaon glauca Hook f. et Thoms. is collected at f1ower- to Arunachal Pradesh. Impatiens laxiflora and 1. ing. A new species，1. bajurensis .，is found in their scabrida are Kashmir to Nepal or eastward. Only collection. This is the first Impαtiens endemic to two species，1. bicolor and 1. glaucαare distributed west Nepal. in west Himalaya westward west Nepal to Kash- Impatiens bαj!urensis is well characterized by the mir. It is concluded that the Impatiens f10ra of west axillary，1 -3 f10wered racemes with a narrow Nepal intermingles the west Himalayan elements bract near the middle of the pedicel，th e larger whitish with the elements of ac ommon floristic area in- yellow flowers attaining 5.5 cm long with al arge cluding Kumaon，N epal and its eastward. saccate-bucciniform lower sepal 2-2.5 cm long A botanical research was made in far west area and 2.2-2.5 cm deep with ac urved 1.2-1.5 cm 一一156一一 June 1993 Joumal of Japanese Botany Vo .l68 No. 3 157 long spur，a nd the crested dorsal petal. Thes pecies 2.2-2.5 cm deep (excluding the spur)，w ith is similar to I. scabrida in having the same type brownish stripes，b ase constricted into ai ncurved of inflorescence and crested dorsal petals，b ut spur; spur 1.2-1.5 cm in overall length. Dorsal differs greatly in the size of the flower and the petal 2.4-2.7 cm long and wide when flattened， shape of lower sepal. The shape of the lower sepal， dorsally with ak eel-like conspicuous crest，c rest saccate-bucciniform，i s unique in the Himalayan 4-6 mmh igh. Lateral united petals 3.5-3.8 cm ImpαtIens. long，u pper lobe oblong，2 .1-2.3 cm long， Hooker and Thomson (1860) described 1. 1.2-1.3 cm wide，l ower lobe narrowly oblong glauca without any description of flowers from with round apex，2 -2.2 cm long，0 .8-1 cm wide. Kumaon，w hich was characterized by the glaucous Stamens 5，a nthers without appendage. Fruits secretion. Hooker (1875，1 904) noted it，bu t never 2.5-3 cm long. mentioned the floral features. Type: Far W Nepal. Seti Zone: B吋uraDistr.， The terms and measurement follow Akiyama Kaudegaon -Babali，al t. 1520 m. On edge of et al. (1991). forest. 29 August 1991. (M. Suzuki et al. 9171054， TI; isotype KATH). Taxonomic treatment Impatiens bajurensis S. Akiyama et H. Ohba，sp . Impatiens glauca Hook. f. et Thoms. in J. Linn. nov. Soc. Bot. 4: 155 (1860) -Hook. f.，F l. Brit. Ind. Species seamless Impatientis scabridae DC. 1: 482 (1875); in Rec. Bot. Surv. Ind. 4: 10 (1904) eodem typo inflorescentiae et cristato dorsali 一Harain Hara et a ，.lEnum. Flow. Pl. Nepal. 2: petalo，s ed hac valde differt et floribus multo 79 (1979). m吋oribusad 5.5 cm longis et infimo-sepalo [Description of flower] Flowers 3.1-3.5 cm saccato-bucciniformi. Forma infimi-sepali， long，3 .9-4.1 cm deep，p ink. Lateral sepals 2， saccato-bucciniformis，u nica inter speciebus widely ovate，9 -11 mml ong，7 -8 mmw ide， himalensibus. shortly apiculate. Lower sepal whitish，b uccini- Plants ca. 50 cm tall. leaves altemate，e venly form，1 .6-1.9 cm long，1 .9-2.1 cm deep (ex- distributed throughout，w ith petioles 2-5 cm long， cluding the spur) ，b ase abruptly constricted into lamina elliptic，1 0-12 cm long，4 -5 cm wide， as hort spur; spur 5-6 mml ong，s traight. Dorsal apex attenuate-acuminate，b ase attenuate，m argin petal pink，1 .3-1.5 cm long，1 .4-1.6 cm wide crenate-serrate，s parsely scabrid hairy on both when flattened，c ucullate，d orsally with ak eel-like surfaces. inconspicuous crest，c rest 2-3 mmh igh. Lateral Inflorescence very short racemose，0 .8-1.5 cm united petals deep pink，2 .7-2.9 cm long，u pper long，a xillary，w ith 1-3 flowers. Pedicel slender， lobe oblong，1 .2-1.3 cm long，0 .5-0.6 cm wide， 15-20 mml ong，s cabrid hairy，w ith ab ract at lower lobe triangular-ovate with attenuate apex， middle part. Bracts lanceolate with acute apex，ca . 1.7-1.9 cm long，1 .0-1.2 cm wide. Stamens 5， 6m ml ong. anthers without appendage. Fruits 2.5-3 cm long. Flowers 5.2-5.5 cm long，4 .2-4.6 cm deep， Specimens examined. Far W Nepal. Seti Zone: whitish yellow. Lateral sepals 2，w idely ovate， Bajura Dist ，.r Porakya -Serigaon，al t. 2200 m. 13-15 mml ong，8 -9 mmw ide，a piculate. Lower On exposed places along paths. 13 August 1991. sepal saccate-bucciniform，2 -2.5 cm long， (M. Suzuki et al. 9170555，TI ，K ATH). 158 植物研究雑誌第68巻第3号平成5年6月 Fig. 1. Impatiens bajurensis S. Akiyama et H. Ohba (a-f) and 1. glauca Hook. f. et Thoms. (g-I). All x1.5. a& g: Flower (lateral view). b& h: Dorsal petal (lateral view). c& i: Dorsal petal (日attened).d& j: Lateral united petals. e& k: Lower sepal. f& 1: Lateral sepal. Wea re indebted to Drs. Futoshi Miyamoto， Studies of Himayan Impatiens (Balsaminaceae) (1). In Ohba H. and Malla S. B. (edよTheHimalayan Plants Tokyo University of Agriculture，a nd Nobuhira 2: 67-94. University of Tokyo Press，To kyo. Kurosaki，S hoei Junior College，K obe，f or supply- Hara H. 1979. Balsaminaceae. In Hara H. and Williams L. H. J.，A n Enumeration of the Flowering ing the materials. This study was supported by a Plants of Nepal 2: 78-80. Trustees of British Museum Grant from the Monbusho Intemational Scientific (Natural History)，Lo ndon. Suzuki M. 1992. A preliminary report of botani- Research Program (Field Research)，N o. 03041035 cal expedition in Far West Nepal in 1991. Newsl. Him. (to M. Suzuki)，in 1991 & 1992，a nd No. 04041038 Bot. no. 10，5-10. (to H. Ohba)，i n 1991，f rom the Ministry of 要旨 Education，Sc ience and Culture，Ja pan. 1991年に西ネパールで採集されたツリフネソウ属植物の一種を新種 (Impatiensbajurensis) と References して記載した.また，これまで西ネパールおよび (Others in the taxonomic treatment) Akiyama S.，O hba H. and Wakabayashi M. 1991. Taxo- クマオンから知られていたよ glaucaの花の形態 nomic notes of the east Himalayan species of Impatiens. の記載を行った.