BALFOUR—NEW SPECIES OF PRIMULA. 205 
farinosus, lobi ad 8 mm. longi obovati imbricati bifidi segmentis 
divaricatis. Stamina filamentis brevissimis subnullis antheris 
circ. 1 mm. longis in flore brevistylo ad faucem antheris fere ex- 
sertis in longistylo infra medium tubi corollini antheris calycem 
vix superantibus inserta. Ovarium ovoideum ; stylus longus 
corollae tubum aequans brevis calycem aequans; stigma 
discoideum margine revolutum. Capsula calycem aequans 
inclusa oblonga circ. 5 mm. longa infra membranacea supra 
incrassata ab apice valvis 5 ad trientem dehiscens; placenta 
cylindrica circ. 2.5 mm. longa stipite tenui circ. I mm. longo. 
Semina fulva complanata elliptica circ. 0.75 mm. longa breviter 
vesiculoso-tuberculata. 
Species Sectionis Yunnanensis foliis longe petiolatis et grosse 
inciso-dentatis, corollae disco aureo-farinoso facile recognoscenda. 
- Bhutan. Dong la, Lingtsi and Tashiyangsi Kurted. Alt. 
12,000 ft. Flowers purple, petals sinuate, yellow eye. Growing 
on mossy stones under Abies forest. R. E. Cooper, No. 4393. 
Ioth Aug. I9I5. : 
Bhutan. East of Lingtsi Kurted. Alt. 12,000 ft. Flowers 
purple. Corolla lobes wavy. On mossy rocks under Abies 
forest. R. E. Cooper, No. 4977. Sept. 1915. 
From the standpoint of geographical distribution a most 
interesting species. P. xanthopa is a characteristic member of the 
Section Yunnanensis of which P. tenella, King is the only species 
hitherto recognised outside China. Like other Bhutan species 
described in these pages it is a link between the Himalayan and 
West Chinese Floras. The plant resembles in its inflorescence P. 
yunnanensis, Franch. itself but is taller. The flat membranous 
leaves with deeply incised margins borne on long petioles dis- 
tinguish the plant from all Chinese allies. It shows the charac- 
teristic decay of the leaves by gradual desiccation which we 
find in the Yunnanensis series associated with delicate rhizomes 
and stolons. This character makes them resent our outdoor 
winter climate. They seem to rot off at once if the old desic- 
cating leaves are kept damp. 
Sse ee 
Fifteen of the forty species of Primula described in the pre- 
ceding pages are the result of more critical examination in the 
light of recently acquired knowledge of the Primulas hitherto 
described from the East and West Himalaya; eight are 
Bhutanese, the outcome of R. E. Cooper’s explorations; the 
others are Western Chinese gathered by Forrest, Kingdon 
Ward, Farrer and Purdom, and Maire, one only being the result 
of differential diagnosis in older Chinese collections. They by 
