232 WILSON EXPEDITION TO CHINA 



Petioli initio villosi, lamina subtus dense villosa. Bracteae insigniter glanduloso- 



fimbriatae; pedicelli laxe v. dense villosi. Flores praecoces v. subpraecoces; 



cupula villosiuscula; petalorum sinus late triangularis. ... P. Dielsiana. 



Ramuli hornotini pilosi. Folia supra sparsim strigulosa v. breviter villosa, subtus 



plerumque dense pilosa, saltern in foliis supremis. (Flores ignoti.) Pedicelli 



fructiferi solitarii v. bini v. terni pilosi. 



Folia minora, 4-7 cm. longa, 1.8-3.3 cm. lata. Bracteae 5-10 mm. longae. 



Pedicelli 21-32 mm. longi. Putamen manifeste sulcatum. P. plurinervis , 



Folia majora, pleraque ultra 8 cm. longa. Bracteae caducae v. ad 5 mm. longae. 



Putamen obsolete sulcatum. 



Rami hornotini breviter hirti. Lamina elliptica v. oblonga, 8-9.5 cm. longa, 



2.5-4.2 cm. lata; supra sparsim strigosa. Bracteae caducae. Putamen 



ovatum P. rufoidcs. 



Rami hornotini dense rufo-hirsuti. Lamina ovata v. obovata v. obovato- 

 oblonga, ad 13.5 cm. longa, 5.7 cm. lata, supra pilis rigidulis conspersa. 

 Bracteae 5 mm. longae, glandulis marginaUbus sessilibus. Putamen sub- 

 rotundatum P. hirtifolia. 



Sect. 2. PSEUDOCERASUS, p. 244. 



Subsect. 7. HYPADENIUM, p. 244. 

 Nulla species in China. 



Subsect. 8. SARGENTIELLA, p. 245. 



Flores coaetanei. 



Folia subtus dense molliter pilosa, petioli pilosi. Pedicelli plus minus pilosi; 

 cupula parce pilosa v. subglabra; stylus basi pUosus. (Flores nonnisi pleni 



noti.) P. pseudocerasus. 



Folia subtus glabra v. parce pilosa. Cupula glabra; stylus glaber (in P. Wil- 



deniana ignotus). 



Folia (infimis interdum exceptis) 9-15 cm. longa, 4.5-7 cm. lata, utrinque 



glaberrima v. raro subtus barbulata, petiolis glaberrimis, intense viridia, den- 



tibus setaceo-acuminatis. Inflorescentiae glaberrimae. . . P. serrulata. 



Folia 4.5-9.5 cm. longa, 2.2-5.1 cm. lata, petiohs saepe pilosis, dentibus 



nunquam setaceo-acuminatis. Pedicelli saepe pilosuli. 



Petioli 10-20 mm. longi; foUa supra glabra v. raro initio pilis conspersa, 



subtus glabra, subpallida, nervis utrinsecus 8-9; cupula 6.5-10 mm. 



longa angusta; sepala 4-5 mm P. tenuiflora. 



Petioli 6-11 mm. longi; folia supra in costa v. etiam in nervis, interdum etiam 

 facie pilis conspersa, subtus in costa densiuscule, in nervis laxius rigidulo- 

 pilosa ceterum glabra v. subglabra, nervis utrinsecus 10-14; cupula 



4 mm. longa; sepala 3 mm P. Wildeniana. 



Flores praecoces v. subpraecoces, glaberrimi, 1-2 in umbella sessilibus v. subsessi- 

 libus. 

 Glandulae foliorum dentibus insidentes inconspicuae. Pedicelli 8-9 mm. longi; 

 cupula 9 mm., sepala Integra 4-5 mm., petala 10 mm. longa; stamina (37) 



6 mm.; stylus glaber P.concinna. 



Glandulae foliorum dentibus insidentes validae. Pedicelli 9-12 mm. longi; 

 cupula 7 mm.; sepala frequenter glanduloso-fimbriolata 4.5 mm.; petala 

 6 mm. longa; stamina (25) 3.5 mm.; stylus inferne parce villosus. 



P. Twymaniana. 



