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NEW A BUPLEURUM (UMBELLIFERAE) FROM CENTRAL CHINA PAN SHENG-LJ ofPhawiacy Faculty ofPhcmnacognosy, School Shanghai Medical University 200032, ^Shanghai REPUBLIC OF CHINA PEOPLE'S PING-SHENGHSU and Department Enviromental Biology Reso/nres School of Life Sciences Fiidan University 200453 Shanghai REPUBLIC OF CHINA PEOPLE'S ABSTRACT A new skhumtnse. from Wenchiian District of northwestern Sichuan species, B//plL'//r//m Province of China, diagnosed, described and ligurcd, and C(>n:ipared wicli the two most similar is species, B. inalanieme Shan et Y. Li and B. chciishoin Shan et Sheh. Besides, a key is given for distinguishing most closely related species of the genus. tlie five eurum Species B. nudanmni Shan et Y. Li affmis, sed differt foliis angiistioribus brevioribus mm 1-2 tcnuioribusque, 7-nervis, radiis plurioribus, phylhs involucelh minoribus longis, pedicellis distincte brevioribus. Simihs etiam B. Shan et Sheh, quod dimorphophyliis, cbu'nljoti'i — phylhs pedicelhs longioribus distinguitur. radiis 3 involticelh facile 5, mm — Radix brunneavel Perenne; totaplantaglaberrima. clongaca, 2 7 crassa, plerumque usque cineracea, raro ramifer, pluriceps. Caules nemerosi, caespitosi, mm 1—2 - cm 40 100 alti, recti, graciles, firmi, ca. diamecro, basi residuis emortuorum vaginarumi instructo. Folia in sicco chartacea, radicalia-basin mm 2-10 cm — tenuioria, linearia, longa er 5 lata, apice apiciilata vel brevi- 1 acuminata, ad basin versus sensim in petiolum angustata, 7-nervia, extinis in margine ipso currentibus, nervis subtus valde prominentibus, nervulis venlscjue omnino inconspicuis; caulina media et superiora inferioribus conformla, sed 5-7 - cm Umbcllae 2 diametro, longe p^edunculatae, Icviterparvioria, nervia. 1 — cm 1—3, pedunculis 1.5 4.5 longis; involucri phylla minuta, linearia vel mm mm 1-5 - - squamiformia, inaequalia, 0.5 3 longa et 0. 0.5 lata, nervia; 1 mm 1-2 2-3 - cm umbellulae diametro; phyllla radii (4-)6 7 (-8), longi; mm mm 1-2 -0.8 involucelli 5,lanceolata, longa et 0.2 lata,umbellulisfloriferis SiDA l5(l):91-93. 1992 92 SiDA 1992 15(1): ^ f/- icicnt!: Naii'*^; !iij^:li',[ IV.' u Wr-B'r^^lLiii *:'. > ^ lUi' .ii I t t .K-f ,'1 I if>t 1 g.i*N i^-^^riT*^^- FIG. Holocyj^e of Bupk/zr///// subnunense. 1 . Pan and Hsu, Bupleurum 93 - parum 5-11, breviora vcl subaequilonga; flores in umbellula breviter (0.5 1 mm mm) pedicellati; petala diametro; ligula subrectangulo, apice flava, ca. 1 emarginato, petalorum tertiam partem subaequantia. Fructus subellipsoidei, 2 mm mm mm — — — 4- 3 longi et 1.2 1.5 lati,pediceIIo 1.5 2.5 longo, vallcculis sulcatis, 3-vittatis. china. Typh: Sichuan PROViNCf;: Wencluian Discricr, 2000 m, on open slope, margin alt. ca. Aug of thickets, 21 I9S5,^.L Pan0442, (PE); same locality, 7 Sep 19^5, S.L Pcw()436{SHMl). A key to the five most closely related species of B//pkur//m given as follows: is Stem not single, caespitose. 1. 1—3; Rays umbel stem much-branched 2. of leaves small, few; Y Shan B. u 'em'h//aneme et Li 2. Rays of umbel more than 4; leaves very long and narrow, more nimierous; stem sparsely branched B. microcephahmi DJels Stem numerouSj caespitose. 1. Leaves dimorphic, the basal ones and those on the lower part of the 3. stem obovate-ianceolate, differs remarkably from those in the middle and much upper part of the stem which are oblong or short linear and smaller Shan Sheh B. chaishoui et Leaves uniforni, linear. 3. mm more 4. Involucel bracts than 2 long, exceeding the pedicel; leaves firm, Y cm up to 5 long; rays of umbel usually less than 5 B. nudconeme Shan et Li 1 mm 4. Involucel bracts less than 2 long, shorter than the pedicel; leaves tender, 6-7 cm Hsu at most 8 long; rays of umbel usually B. skhuamnse^l.. Pan et REFBRF.NCES Yin, and Mhng-Lan. 1979- Flora Reipublicae Popularis Sinicae Li Shi; BiipkiiriDiL In: 55(1): 215-295;299-300.