ROSACEAE. — PRUNUS 229 



nulli V. breves, ad summum cupulae aequilongi; involucra parva, sub anthesi 

 persiatentia; petala haud emarginata (an semper?). (Africa borcalis, Europa 

 meridionalis, Creta, Asia occidentalis et centralis, Himalaya, China; in Korea 

 et Japonia nonnisi culta) Sect. II. AMYGDALOCERASUS. 



CLAVES SEU CONSPECTUS SPECIERUM SINENSIUM. 



Grexl. TYPOCERASUS, p. 237. 



Sect. 1. CREMASTOSEPALUM, p. 237. 



Subsect. 1. MAHALEB, p. 237. 

 Nulla species chinensis. 



Subsect. 2. EUCERASUS, p. 237. 

 Nulla species chinensis. 



Subset. 3. PHYLLOMAHALEB, p. 238. 



Ser. 1. Aphanadenium, p. 238. 



Cupula sepala petala glaberrima (in altera specie P. Maximowiczii haud chinensi 

 pilosa) P. pulchella. 



Ser. 2. Macradenium, p. 238. 



Glandulae foliorum bractearumque dentibus insidentes breviter conicae. Petioli 

 pallidi V. interdum purpurascentes. 

 FoUa subtus glabra v. in nervorum axillis barbulata v. in costa parcissime pilosa. 

 Racemi glaberrimi. 

 Folia latiora (3.5-9:2.4-4.8 cm.). Pedicelli 5-15 mm. longi. Putamen 

 oblique ovatum, validiuscule oblique sulcatum apiceque scrobiculatum. 



P. conadenia. 



Folia angustiora (4-8.7: 2-3. 5 (-4) cm.). Pedicelli 12-22 mm. longi. Putamen 



rotundatum, valide reticulato-sulcatum ac scrobiculatum. P. pleiocerasus. 



Folia subtus undique breviter hirtella. Racemorum axis brevis pedicellique 



hirtelli P. macradenia. 



Glandulae foliorum, sed imprimis bractearum depresso-disciformes. Petioli saepis- 

 sime saturate v. nigricanti-purpurei. Putamen ovatum. 

 Folia majora (4-10:2.5-5 cm.). Bracteae majores (8-25 mm. longae). Putamen 



obsolete oblique sulcatum P. discadettia. 



Folia minora (3-4:2 cm.). Bracteae minores (3-8 mm. longae). Putamen 

 laevissimum P. szechuanica. 



Subsect. 4. PHYLLOCERASUS,* p. 238. 



Glandulae foliorum dentibus insidentes crassiusculae, subdepresso-capitatae 

 (v. in var. stenadenia conicae), bractearum insigniter disciformes, crassae (v. in 



* The conspectus of tliis group must be considered as provisional and can give 

 only an approximate guide for the determination of the species. It is not pos- 

 sible to give a workable key, as of several species only the flowers, of others only 

 the fruits are known. 



