ROSACEAE. — PRUNUS 229 
nulli v. breves, ad summum cupulae aequilongi; involucra parva, sub anthesi 
persistentia; petala haud emarginata (an semper?). (Africa borealis, Europa 
meridionalis, Creta, Asia occidentalis et centralis, Himalaya, China; in Korea 
et Japonia nonnisi culta). . ...... Sect. II. AMYGDALOCERASUS. 
CLAVES SEU CONSPECTUS SPECIERUM SINENSIUM. 
Grex I. TYPOCERASUS, p. 237. 
Sect. 1. CREMASTOSEPALUM, p. 237. 
Subsect. 1. MAHALEB, p. 237. 
Nulla species chinensis. 
Subsect. 2. EUCERASUS, p. 237. 
Nulla species chinensis. 
Subsct. 3. PHYLLOMAHALEB, p. 238. 
Ser. 1. APHANADENIUM, p. 238. 
Cupula sepala petala glaberrima (in altera specie P. Maximowiczii haud chinensi 
pios). s UV uewel QM Vc RU P. pulchella. 
Ser. 2. MACRADENIUM, p. 238. 
Glandulae foliorum bractearumque dentibus insidentes breviter conicae. Petioli 
pallidi Y. interdum purpurascentes. i 
Folia 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 Mod: ; 
i ia. 
Folia angustiora (4-8.7:2—3.5(-4) em.). 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. 
Wi UE du NU ÉL RC OA EE CR UNO KONSUM 
obsolete obliquesuleatum . . ...... rne . 
Folia minora (3-4:2 cm.). Bracteae minores (3-8 mm. longae). Putamen 
lieyisümum . . — . .« $0302 9x ee ELEME ess s P. szechuanica. 
Subsect. 4. PHYLLOCERASUS,! p. 238. 
Glandulae foliorum dentibus insidentes crassiusculae, subdep pitatao 
(v. in var. stenadenia conicae), bractearum insigniter disciformes, crassae (v. in 
1 The conspectus of this 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. 
