200 WILSON EXPEDITION TO CHINA 



numerous long antler-like spines covering the ripe involucre. It is perhaps most 

 closely related to Castanopsis tribuloides, var. longispina King, which is a very much 

 more glabrous plant, with leaves inclined to be broadest below the middle and 

 with fewer, less prominent secondary nerves; the spines on the involucre are 

 straighter and branch from near the base, and the ripe gland is glabrous. The 

 whole appearance of specimens of the two plants is very different. The typical C. 

 tribuloides De CandoUe and its other varieties are much farther removed from this 

 new species. Henry's specimen differs in the leaves which are from 15 to 18 cm. 

 long, cuneate at the base and shghtly more prominently toothed, with petioles 

 from 0.8 to 1.5 cm. long, but we have no hesitation in referring it to our new species. 



C. ceratacantha is a handsome evergreen tree and is fairly common in woods at 

 low altitude in the little known region between Mt. Omei, Mt. Wa and Mt. Wa-wu 

 in western Szech'uan. 



Pictures of this tree will be found under Nos. 314, 322 of the collection of Wil- 

 son's photographs and also in his Vegetation of Western China, No. 150. 



Castanopsis platyacantha Rehder & Wilson, n. sp. 



Arbor 6-25-metralis, trunco 1-3 m. in circuitu metiente, cortice 

 cinereo in lamellas tenues irregulares fisso; ramivalidi patentes; 

 ramuli glabri, atropurpurei; gemmae ovato-oblongae, rarius ovatae, 

 compressae, acutiusculi, 0.5-1.3 cm. longae perulis biserialibus scari- 

 osis late ovatis v. ovatis, pallide olivaceis nitidulis glabris ciliolatis. 

 Folia persistentia, coriacea, elliptico-lanceolata v. elliptico-oblonga, 

 rarius elliptica, subito acuminata, basi obliqua, late cuneata v. fere 

 rotundata, supra medium remote paucidentata, rarius integra v. fere 

 integra, 8-16 cm. longa et 2.5-6, rarius ad 7 cm. lata, supra intense 

 viridia, glabra, nitida, subtus tomento crustaceo fulvescente demum 

 albo-cinereo costa media glabra excepta dense obtecta, costa media 

 supra leviter elevata v. plana, subtus elevata, nervis utrinsecus 8-10 

 supra obsoletis subtus leviter elevatis plerumque ante marginem anasto- 

 mosantibus; petioli crassiusculi, 8-10 mm. longi, glabri. Amenta 

 mascula in axillis foliorum v. bractearum ad basin innovationum soli- 

 taria rhachis glabra stricta, angulata, 7-16 cm. longa; flores fasciculati; 

 perianthii lobi anguste ovata v. obovata, concava, 1.5-2 mm. longi, 

 extus glabri, intus villosi; stamina exserta, 4.5-5 mm. longa, filamentis 

 glabris filiformibus, antheris globosis; ovarii rudimentum dense vil- 

 losum. Spicae fructiferae axillares in parte superiore ramulorum, 5-6 

 cm. longae; fructus biennes, sessiles, subglobosi v. late ovoidei; involu- 

 cra dense echinata, spinis fasciculatis 3-5 mm. longis in seriebus con- 

 centricis dispositis triangularibus compressis rarius fere subulatis apice 

 pungente glabro, ceterum ut involucrum cinereo-tomentosis ; glandes 

 1-3, plerumque 1, late conico-ovoideae apiculata, 1.2-1.5 cm. altae, 

 1.2-1.8 cm. diam., pallide brunneae, puberulae, maculo basali latis- 

 simo, interdum fere dimidiam glandem obtegente. 



