DIELS—POLYGONACEAE. 259 
nervi patentes. Folia caulina similia, brevius petiolata ; ochreae 
petiolo conspicue breviores. Inflorescentia corymboso-paniculata 
dense conferta, hinc inde foliata. Bracteae tenuiter scariosae 
fuscae, pedicellis longioribus ; pedicelli dense pilosi, 2-4 mm 
longi. Tepala 4-5, inaequalia, nonnunquam partim connata, 
marginibus saepe sese tegentia, obovata vel late obovata, pluri- 
nervia, basi subsaccato-producta, ochroleuco-alba, intus ima basi 
nectariis transversis atropurpureis praedita, 2°5~3°5 mm. longa et 
lata. Stamina 6-8, circ. 1°5 mm. longa, antherae atropurpureae 
vel fuscae. Gynaeceum 0°7-0°8 mm. longum, styli 3 liberi, 
stigmata capitata. 
‘“ Marshy ground on hillsides. Descent of Kari Pass, Yangtse- 
Mekong divide. Alt. 10,000 ft. Tibet, 1904.’’ G. Forrest. 
ae 
“Plant of 2-4 inches. Flowers white. Crevices of limestone 
cliffs on the eastern flank of the Lichiang Range. Lat. 27° 
25’ N. Alt. 11-12,000 ft. September 1906.”’ G. Forrest. No. 
2g11.—Smaller than the other specimens. Stems often not 
much longer than the basal leaves. 
“Plant of 4-8 inches. Flowers creamy white. Moist ledges 
and in crevices of cliffs in side valleys on the eastern flank of the 
Tali Range. Lat. 25° go’ N. Alt. nes te ft. June—Sep- 
tember 1906.’”’ G. Forrest. No. 
Also Tali region, Delavay, No. a No. 4043 in Herb. Paris 
and Tsekou, Monbeig in Herb. Kew. 
This remarkable Polygonum is similar in habit to Oxyria. 
Its affinity is with P. nummularifolium, Meissn., of the Alpine 
Himalaya, but it differs by the number of stamens and styles, 
and generally much larger size. It shows evidently that Hooker 
(Fl. Brit. Ind. v, 49) was right in placing P. nummularifolium into 
Aconogon ; Meissner thought it belonged to Cephalophilon (DC. 
Prodr. xiv, 127). 
Polygonum suffultum, Maxim. in Bull. Acad. Sc. St. 
Pétersbourg, xxii (1877), 233. (Mél. biolog. ix, p. 616). 
I.F.S. ii, 350 (Journ. Linn. Soc. xxvi, 350) 
“ Plant of 6-12 inches. Flowers pink. Moist, grassy, shady 
situations in mixed and pine forests on the eastern flank of the 
Lichiang Range. Lat. 27° 12’ N. Alt. g-10,000 ft. May 
1906.” G. Forrest. No. 2186. 
“ Plant of g-12 inches. Flowers white. Mossy, shady situa- 
tions in mixed forests on the eastern flank of the Tali Range. 
Lat. 25° 40’ N. Alt. g-10,000 ft. June-August 1906.” G. 
Forrest. No. 4571. 
“ Plant of 3-6 inches. Flowers pinkish white. Shady, grassy 
situations on the margins of pine forests on the eastern flank of 
