ROSACEAE. — PRUNUS 231 



Subaect. 6. LOBOPETALUM, p. 241. 



Ser. 1. Heterocalyx, p. 241. 



Clavis Specierum, qtjarum Flores suppetunt. 



The two species of which the flowers are not yet known cannot be compared 

 with the others and therefore are only mentioned here; the material available ia 

 not yet sufficient to form a clear idea of the affinity of the species in this group. 



Styli glabri. 



Pedicelfi parce pilosi v. glabri; involucra ante anthesin decidua v. paucissima 

 persistentia; cupula glabra v. basi tantum villosa. 

 Pedunculus 5-9 mm. longus, laxe liirtellus; pedicelli laxe villosiusculi; cupula 

 subanguste campanulata, basi densiuscule hirtella, superne glabra; petala 

 biloba sinu triangulari-aperto; stamina 34, petalis triente breviora. 



P. scopulorum. 



Pedunculus nullus; pedicelU glaberrimi; cupula breviter tubulosa, glabra; 



petala inciso-biloba, sinu angusto; stamina 54, petalis quarta parte breviora. 



P. glabra. 

 Pedicelli dense pilosi, involucris arete adhaerentibus inclusi v. subinclusi; cupula 

 dense pilosa v. superne glabra; petala biloba, sinu triangulari-aperto. 

 Cupula campanulata; petala orbicularia; stamina 43, petaUs triente breviora. 



P. involucraia. 

 Cupula breviter tubulosa; petala basi cuneata, ovato-oblonga; stamina 51, 



petaUs aequilonga P. hirtipes. 



Styli inferne pilosi; pedicelli floresque dense pilosi. 



Involucra sub anthesi fere omnia caduca. Pedicelfi 12-14 mm. longi; cupula 

 tubulosa; sepala intus glabra; petala ovalia, inciso-biloba, sinu angustissimo; 



stamina 39, petalis triente breviora P. Schneider iana. 



Involucra arete adhaerentia; pedicelfi 6-9 mm. longi, inclusi v. subinclusi; cupula 

 campanulata; sepala intus breviter villosa; petala ovata, brevissime emar- 

 ginata; stamina 33, petaUs aequilonga P. Duclouxii. 



Species quarum flores ignoti. 



Plantae glabrae. Fofia majuscula lata, dentibus parvulis v. mediocribus, latis, 

 cuspidatis. 

 Petiofi 8-10 mm. longi, glandulas 2 crassas gerentes; lamina 12-13.5 cm. longa, 



6.5-8.4 cm. lata, dentibus glandula valida breviter conica terminatis. P. ampla. 

 Petioli 10-16 mm. longi, aut maculas 2 vi.x tumidas aut glandulas latas (interdum 



laminae basi insidentes) gerentes; lamina 6.5-13 cm. longa, 4-7.4 cm. lata, 



dentibus glandula punctiformi terminatis P. malijolia. 



Ser. 2. Cyclaminium, p. 243. 



I assume that the species of which the flowers are unknown belong here, because 

 the leaves resemble closely those of P. Didsiana. 



Ramufi hornotini glabri. Fofia supra glabra. Involucrum magnum, sub anthesi 

 persistens. Flores (2-)3-6 umbeUati v. subumbellati. 

 Petioli glabri, lamina subtus glabra v. in nervis initio parce pilosa. Bracteae 

 brevius glanduloso-fimbriatae; pedicelli laxiuscule villosi v. superne villosi; 

 flores coaetanei; cupula glabra; petalorum sinus anguste triangularis. 



P. qjclamina. 



