236 WILSON EXPEDITION TO CHINA 
Drupa nigra, putamen validiuscule suleatum ac manifeste v. obsoletissime fo- 
veolatum. Petioli 5-11 mm., glabri, subtus plerumque corrugati; lamina 
obovata, obovato-oblonga v. rhombeo-oblonga (1.7-6:1.1-3 cm.), supra par- 
cissime strigulosa v. subglabra, subtus in costa nervisque laxe hirta ceterum 
glabra v. sparsim pilosa, costa subtus utroque latere anguste albido-alata, 
nervis utrinsecus 7-10. Pedunculus nullus, pedicelli solitarii, 10-13 mm. longi. 
P. pleuroptera. 
Putamen ovale v. ovatum. 
Putamen valide sulcatum et foveolatum, sulcis pluribus. Petioli 7-15 mm., 
parce hirti v. glabri. Drupa pallida v. rubra. Pedicelli glabri, sursum 
sensim incrassati. 
Foliorum nervi utrinsecus 10-16; lamina ovato-oblonga, oblonga v. inverse 
oblonga (5-8.5:2.5-4 cm.), supra pilis rigidulis conspersa, subtus in costa 
nervisque densiuscule ceterum laxe breviter hirta. Pedunculus 8-12 mm.; 
bracteae 3, herbaceae, circ. 4 mm. longae, pedicelli 17-24 mm. P. podadenia. 
Foliorum nervi utrinsecus 6-10; lamina obovata, inverse oblonga v. oblongo- 
lanceolata (2-8:1.3—4.4 cm.), supra sparsim strigosa vel subglabra, subtus 
in costa nervisque parce hirta ceterum glabra v. subglabra. Pedunculus 
1-6 mm.; bracteae deciduae, pedicelli 1-2ni, 11-35 mm. .  P.lobulata. 
Putamen obsolete v. obsoletissime sulcatum, sulcis circiter 2-3. . Drupa nigra v. 
fusco-rubra.  Petioli 7-10 mm.; lamina rhombeo-obovato-oblonga v. obo- 
vato-oblonga (1.8-8:0.8-3.5 cm.), supra parcissime strigulosa v. glabra, subtus 
axilloso-barbulata, in costa glabra, in nervis parce v. parcissime hirtula, nervis 
utrinsecus 5-7. Pedunculus 0-6 mm., bracteae 1-2, herbaceae, 4-6 mm.; 
pedicelli solitarii, 15-17 mm., glabri, summo apice tantum incrassati. 
P. Zappeyana. 
Ser. 4. EucERASEIDOS, p. 259. 
Ramuli novelli dense hirtelli; petioli 4-8 mm., hirtelli; lamina ovata, obovata, 
v. ovato-oblonga (2-3.8:1-2 cm., sub anthesi), caudata, inciso-duplicato-serrata, 
dentibus late ovatis, obtusiusculis, subcuspidatis, glandula capitata terminatis, 
supra strigulosa, subtus in costa hirtella ceterum glabra, nervis utrinsecus circ. 
10. Involucra decidua; pedunculus 0-8 mm.; flores 1-2 umbellati, coaetanei; 
bracteae 2-3 mm. longae, fuscescentes; pedicelli 4-9 mm., dense pubescentes; 
cupula 5-6 mm., crasse campanulata, ' dense pubescens; sepala suberecta, tri- 
angularia acuta, 2.5 mm., integra v. subintegra, utrinque pilosa; petala ovalia, 
8:5.5 mm.; stamina 27, ad 10 mm.; stylus glaber TE e es P. caudata. 
Ser. 5. AMBLYODON, p. 262. 
Folia 2-5 cm. longa, anguste obovata, subtus glabra, dentes circ. tam longae quam 
latae v. paullo longiores. Pedicelli fructiferi 7-10 mm. longi . . P. gracilifolia. 
Folia 3.5-6 cm. longa, obovato-rotundata, subtus axilloso-barbata, dentes latiores 
quam longae. Pedicelli fructiferi 12-14 mm. longi. . . . . P. Rossiana. 
Grex II. MICROCERASUS, p. 262. 
Sect. 1. SPIRAEOPSIS, p. 262. 
Subsect. 1. MYRICOCERASUS, p. 262. 
Species Americae borealis. 
Subsect. 2. SPIRAEOCERASUS, p. 262. 
Folia obovato-oblonga, oblonga, oblongo-lanceolata, lanceolata, elliptica, haud 
v. parum acuminata, breviter simpliciter v. pro parte subduplica 
v. -crenata, 
