DIELS—CONVOLVULACEAE. 203 
Range. Lat. 27° 20’ N. Alt. g~-11,000 ft. August 1906. 
' N.W. Yunnan.” G. Forrest. No. 2708. 
The foliage is very like that of C. fuscipappa, Benth., but our 
plant is perennial, the inflorescence is quite glabrous and the 
pappus white. 
1¢% 
Prenanthes yakoensis, J. F. Jeffrey. Sp. nov. 
i 
Species affinis P. scandent, Hook. of. et rire sed laminis 
foliorum basi p ,cap j et paucioribus 
distinguenda. 
Caulis semi-scandens glabratus, ramulis crebris flexuosis. 
Folia cordato-ovata vel ovato-sagittata, acuminata, obsolete 
crenata, denticulis setaceis remotis praedita; lamina basi profunde 
in sinum subrotundatum excavata, 5-15 cm. longa, 2-6 cm. 
lata, supra sparse puberula, infra paulo densius praesertim in 
nervis, infra glaucescentia et venulis pulchre reticulatis conspicua ; 
petiolus pubescens vel in maturitate glaber, 3-5 cm. longus, 
infra glaucescens. Capitula 6-7 aggregata in paniculis laxis 
axillaribus terminalibusque circ. 1 cm. longa, 5 mm. lata, 10-12- 
flora. Pedunculi circ. 1 cm. longi, fere rectangulo patentes, 
bracteis minutis subulatis praediti. Phyllaria interiora 6-8 
lanceolata obtusiuscula, exteriora parva hirsuta. Corolla externe 
ad medium pilosa. Achaenium 4 mm. longum, compressum, 
striatum. Pappus subuniserialis, albidus. 
“ Half-scandent plant of 8-12 ft. Flowerscrimson. Amongst 
scrub in shady situations, edges of pine woods, etc., Salwin 
valley, Salwin-Irrawadi divide. Only in one place, viz. :—Summit 
of the Yakoridge. Lat. 26°30’N. Alt. goooft. N.W. Yunnan, 
November 1905.” G. Forrest. No. 870. 
CONVOLVULACEAE. 
Ipomaea caloxantha, Diels. Sp. nov. 
Planta repens, 0°9-3°2 m. longa. Folia (superiora) ad in- 
sertionem petioli ca. 2 mm. longi pilosa, ceterum fere glabra, 
e basi cordata subtriloba (lobis basalibus brevibus obsolete 
undulatis, lobo terminali longiore, lanceolato, acuto), 3-3°5 cm. 
longa (basi), 2-2°5 cm. lata. Cymae 3-5-florae, longe pedun- 
culatae; pedunculus 2°5-4°5 cm. longus, pedicelli 0°6-1°3 cm. 
longi, bracteolis 2 minutis praediti. Sepala coriacea, marginata, 
glabra; exteriora majora, obovata, 6-8 mm. longa. Corolla 
intense lutea, 3-4 cm. longa. Ovarium 2-loculare 4—ovulatum. 
“ Creeping plant of 3-10 ft. Flowers bright yellow. On dry, 
exposed, rocky situations. Valley of the Mekong at the crossing 
of the Teng-Yueh-Talifu road: Lat. 25° 18’ N. Alt. 4200 ft. 
W. Yunnan, September 1903.”” G. Forrest. No. 1111. 
