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2 ; ON OBSERVATIONS BUCKLEYA (THESIACEAE) CHINA IN and and Harvard University Herbaria Lab ofSystematics Evolutionary Botany Biodiversity 22 Divinity Avenue College ofLife Sciences USA 2 Cambridge, Massachusetts 138-2020, Zhejiang University Hangzhou CHINA 310058, Zhejiang, Qiu-Yun (Jenny) Xiang and and Botany Department Lab ofSystematics Evolutionary Botany Biodiversity North Carolina State University College ofUfe Sciences Campus Box 761 Zhejiang University USA Hangzhou CHINA Raleigh, North Carolina 27695-76 3 10058, Zhejiang, 12, CHINESE ABSTRACT & tt 6 Miquel- 1908^BucWeya (Siebold Zucc.) : henryi Diels£*tt3fc lanceolata , & Zhou angulosa S B. B. ( n5B*#mB.lanceolatam&o*XmmB£#m#mft7ii&, mx mm xm® *®mm %% * ; : ; ; nn and North Hangzhou, China, 3 s class 2008 from Zhejiang University, ^ field trip in with students Molina Anhui number southern State University, North we visited a of sites in Raleigh, Carolina, U.S.A., ** m Zhe was Qiyun Shan, in Xiuning Xian, ian One areas J g provinces. of the most floristically interesting Anhm Province. Among on Qiyun Shan, was a most interesting shrub of the the rich assemblage of plants 5 Budde a T in the Santalaceae, it will Pj y orr. (Thesiaceae. Although Buckleya has been placed traditionally pUced treatment of the genus in forthcoming Thesiaceae by submitted) in the D. Nickrent (manuscript . 1111 Florao f North America; also Nickrent et in press). al. upon was compared with Qiyun Shan returning from to the United the collection of Buckleya States, T*cunens B & and with specimens of B. henryi of from Japan ancedata Mique Zucc (Siebold (Fig. i l 1) ) k any from Eshbaugh or and (1982) China, monograph by Carvell since did not descriptions in the it fit & Qiyun Shan resembled from $pecies of The plants J* Buckleya in the Flora China (Xia Gilbert 2003). of ^Panese and somewhat and broader in the B. mature fruit lanceolata in the longitudinal grooves of the ^ ^-acuminate Buckleya and inflorescences. “ having terminal axillary leaves, but they resembled henryi in B. produces both sometimes China froni from ^ J3Pan has only terminal inflorescences, but B. henryi & reported are terminal The trichomes of B. lanceolata Eshbaugh 1982). inflorescences (Carvell T both uniseriate and multicellular while B. henryi has minute conical and/or papillate trichomes (“hairs”) be to parts (Carvell and Eshbaugh, 1982). Some specimens of from however, vegetative B. lanceolata Japan, on the & have the long trichomes, for example, H. Ohashi Ueno 8557 (A) from along the Takase River in Y. do not & Fukushima Namie-machi, Futaba-gun in Prefecture. In fact, the Ohashi Ueno specimen, collected north Tokyo, closely resembles our Anhui collections vegetatively. In many ways the plants of Buckleya from of Anhui appear to be hybrids between the Japanese B. lanceolata and the Chinese B. henryi. After making these we became aware that plants from Tianzhu Shan, Anhui, and matching the characteristics of observations & our find on Qiyun Shan, were described and named B. angulosa by S.B. Zhou X.H. Guo (2004). Housed in the Harvard University Herbaria (A, GH) are other specimens from southern Anhui that resemble the plants we saw in the field. Specimens of Buckleya from farther north in Henan and from the Qinling (and Funyu) Mountains, however, have more slender, elliptic leaves and the fruiting sepals are but a quick glance and without careful measurements, both characters appear to be variable. smaller, at The plants from Anhui have leaves that are broader toward the base, or at least below the middle, and the from Most *pex is acuminate-caudate, but not as obviously acuminate-caudate as in B. lanceolata Japan. plants of B. lanceolata have uniseriate, multicellular trichomes on the vegetative parts, particularly near the base on the lower surface of the leaves, plus minute conical projections (trichomes). Buckleya henryi lacks Anhui multicellular trichomes, but has the minute conical projections. Although the plants from resemble the Chinese B. henryi in pubescence, several specimens of B. lanceolata from Japan also have similarly shaped Itaves and similar pubescence. Pubescence and shape are therefore not 100 percent reliable features for leaf distinguishing the species of Buckleya in Asia. The illustration of Buckleya angulosa provided by Zhou and Guo (2004) matches our collections (Fig. 2) I wtU in showing the axillary inflorescences and elliptic sepals on the fruit. Although they provide a diagnostic to separate the Chinese species of Buckleya, B. henryi is neither mentioned in their key to the species m China nor in the The narrowly leaves in their illustration of B. angulosa, narrative of their paper. elliptic Qiyun from Shan. •'wever, resemble more than they do those of our collection closely those of henryi B. °w Zhou and shown of specimens on in the illustration also lack the peculiar apical projection the leaves, Guo and which appear sporadically on Asian species of Buckleya. ’ all Guo Buckleya may by Zhou and (2004), since henryi not have been considered to be a distinct species it w« placed in synonymy under by Tam (1988) in the treatment of the genus in Flora Reipublicae B. lanceolata *¥daris who two species of Buckleya in recognize Sinicae volume Xia and however, also 24. Gilbert (2003), has B China that henryi graebneriana Diels and noted in their treatment in the Flora of B. B. henryi, h*® confused with the Japanese B. lanceolata. how on ln examining one cannot to speculate the specimens from Japan and China, fail of Buckleya Would have j might separate species have been treated had they occurred in China, or all in Japan. all | been them used separate are ^cognized, or even rank? The characteristics to an distinct taxa infraspecific at j ** wa and length of the sepals pubescence y$ clear and shape, considerable can be seen in leaf plasticity f can distinguish easily J^efruit. Although and lanceolata the differences in most individuals of B. henryi B. ^-careful occur in the individuals that study distinctions needed discontinuous is to determine clear, if **yy examples be plants combine seemingly intermediate 1 Might these two characteristics of the species. = angulosa?) ^hybridization xB. lanceolata B. henryi where between species (B. the offspring of crosses r® unland after 1 themselv together maintained have sympatrically during Pleistocene the ^extinction of one of the parents there? am Carvell and Eshbaugh with both axillary y plants (1982) speculated that by recognized lnceslr Of the four species al in being derived. Buckleya, with terminal inflorescences *ey being a direct with lanceolata ' considered ancestral form, B. B. henryi be most similar to the . to SS* by Carvell hypothesized The relationships molecular supports the analysis by Li et al. (2001) ^ understanding of adds the to Z Now, complexities 8*1 with and the it ; - the recognition of B. angulosa taxonomy b review of the comprehensive «t genus, a biogeographically and important interesting a Anhui Yiiininn Yian Hivim Qhan F Rnufford. CX. fU> 0- f) Zhao 405 15 (A).