DIELS—APOCYNACEAE. 165 
ACERACEAE. 
94v Acer Forrestii, Diels. Sp. nov. 
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P 
Arbor 7-12 m. alta. Foliorum petiolus (siccus purpureus) 
2-2'5 cm. longus; lamina supra glabra, subtus pallidior glauce- 
scens ad nervorum confluxum barbata, ceterum glabra, nervulis 
minute reticulata, e basi cordato-excisa trilobata, lobis caudato- 
acuminatis, margine toto adpresse duplo-serrata, 7-8°5 cm. 
longa, 5-65 cm. lata. Racemi foliis coaetanei, brevissime 
pedunculati, simplices, angusti, 6-7 cm. longi, 1'2-1°4 cm. lati, 
fere glabri. Sepala anguste obovata; petala anguste spathu- 
lata, circ. 3 mm. longa, sepalis longiora, fusco-viridia; discus 
glaberrimus. 
“Tree of 25-35 ft. Flowers brownish-green. Shady 
side valleys on the eastern flank of the Lichiang Range. 
Lat..27° 12’ N, . Alt. t0,000 ft. May 1906.” -G. Forrest. 
Sect. Spicata, Pax. Allied to Acer stnense, Pax, a 
native of Hupeh and Szechuan, but differing by the trilobed 
leaves serrate all round, simple inflorescences and narrower 
sepals and petals. 
APOCYNACEAE. 
Alstonia yunnanensis, Diels. Sp. nov. 
Frutex 1-1°6 m. altus, rami conspicue lenticellati, ramuli 
virides novelli puberuli. Folia 3-4 verticillata, inaequalia, 
breviter petiolata, herbacea, supra fere glabra subtus pallidiora 
puberula, utrinque longe angustata, oblonga vel oblanceolata, 
acuminata, 6-14 cm. longa, 2°5-3°5 cm. lata; nervi laterales 
numerosi sursum arcuati supra pallidi; glandulae interpetiolares 
subulatae. Cymae puberulae. Flores breviter pedicellati. Sepala 
e basi ovato-triangulari, subulato-acuminata, nigro-striolata, 
3°5 mm. longa. Corollae roseae tubus 10 mm. longus, usque 
ad dimidium anguste (1°8-2 mm.) cylindricus, dein ad 3 mm. 
ampliatus, ibique intus lanuginosus; limbi lobi subelliptici 
5 mm. longi ciliolati. Fructus folliculi (an maturi?) sessiles 
divergentes subfalcati, anguste cylindrici, longius rostrati. 
“ Shrub of 3-5 ft. In woods on hills west of Yunnanfu. Alt. 
7-8000 ft. Flowers pale pink. February 1905.” G. Forrest. 
No. 592. (From about the same locality also Ducloux, zoth 
April 1904.) 
Sect. Blaberopus (Hook. f. in Flor, Brit. Ind. iii (1882) 642). 
Allied to A. nertifolia Don, but differing in the more herbaceous 
leaves and apparently smaller follicles. 
