236 WILSON EXPEDITION TO CHINA 



Drupa nigra, putamen validiuscule sulcatum 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 utrlnsecus 7-10. Pedunculus nullus, pedicelli solitarii, 10-13 mm. longi. 



P. pleuroptera. 

 Putamen ovale v. ovatimi. 

 Putamen valide sulcatum et foveolatum, sulcis plm-ibus. 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 ceteriun 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 l-2ni, 11-35 mm. . P. lobulata. 

 Putamen obsolete v. obsoletissime sulcatum, sulcis circiter 2-3. Drupa nigra v. 

 fusco-rubra. PetioU 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, obtusiuscuUs, 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; pediceUi 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 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. 



GrexII. MICRO CERASUS, 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, baud 

 V. parum acuminata, breviter simpliciter v. pro parte subduplicato-serrulata 

 V. -crenata. 



