484 
Pieris ovalifolia. D. Don, 313. 
Pilea aquarum, Dunn *, 366, 
pumila, A. Gray, mentioned, 866, 
Pinellia Browniana, Dunn *, 370. 
cordata, №. E. Br., 371. 
Pires of Northern China, 198, 
Pinguicula, Tourn., in Mexico, 431 ftnote. 
Pinnularia biceps, Greg., 155. 
Tourn, 297; distrib, 904; in 
Mexico, 431, ftnote; mentioned, 
199 ; of Greenland, 200 ; — Grinnell 
Land, 200 ; — W. China, 199. 
Armandi, Franch., distrib., 202, 204. 
Bungeana, Zuce., distrib., 202, 204 ; 
of N. China, 198. 
Sieb, 
Pinus, 
densiflora, 
203. 
dentata, Mast., distrib., 203, 204; of 
S.W. China, 199. 
formosana, Hayata *, 297. 
Henryi, Mast., distrib., 203, 204; of 
Centr. China, 198. 
insularis, Endl., distrib., 204, 
Khasya, Royle, distrib., 204. 
koraiensis, Sieb. & Zuee., distrib., 
203. 
luchuensis, Mast., distrib., 203. 
mandshurica, Rupr., distrib., 203. 
Massoniana, Lamb., distrib., 203; of 
N. China, 198. 
montana, Mil, (?), 290. 
Montezumæ, Lamb., in Mexico, 432. 
parviflora, Sieb. & Zuec., mentioned, 
298, 
prominens, Mast., distrib., 203, 204; 
of S.W. China, 199, 
scipioniformis, Mast.. distrib., 
204; of Centr. China, 198, 
sylvestris, Linn., 210. 
Thunbergii, Parl., distrib., 203. 
yunnanensis, Franch., distrib., 204; of 
S.W. China, 199. 
Piper capense, Linn. f., 278. 
dindigulense, Mig., 364. 
Futokadsura, Sieb. $ Zuce., 305, 
Piperaceæ, 39, 40; from Fokien, 264; from 
Ruwenzori, 278. 
Piperales, primitive features, 43; ш- 
florescence, 39 ; seed-development, 40. 
Pireunia abyssinica, Mog., mentioned, 977. 
Pistia Stratiotes, Lnn., 18, 25, 
& Zucc, distrib., 
205, 
INDEX. 
Pittosporeæ from Pahang, 303. 
Pittosporum ferrugineum, Dryand., men- 
tioned, 304. 
sp., 903. 
Placodermæ (Sub-fam.), 108. 
Plankton, Chlorophyceous, 92 ; of African 
lakes, 81; from Lake Nyasa, 18; from 
Lofu hiver, 96, 97; from Tanganyika, 
20. 
Plant-remains from Norfolk and Suffolk, 
list of, 209. 
Plantaginei, fossil, 210; from Ruwenzori, 
277. 
Plantago palmata, Mook. f., 
tioned, 231. 
Plants from Mt. Ruwenzori (Rendle, Baker, 
& Moore), 228-278. 
Platanthera bifolia, Rich., 392-5; abnor- 
mal, 3, 4. 
var, tricalcarata, Somm., 304. 
chlorantha, Cust., 4. 
— — var. tricalcarata, Hemsl.*, 4, 5, 
391, 298. 
ciliaris, Lindl., spurless, 398. 
fimbriata, Lindl., spurless, 393 
hyperborea, Lindl., spurless, 398. 
Platanus, T'ourn., in Mexico, 431 ftnote, 
Platyclinis gracilis, Hook. f., 323. 
Kingii, Hook. f., 323. 
Platystoma africanum, Beauv., 271, 
Plectonema, Thur., 173. 
Tomasinianum, Born., 173. 
Wollei, Farlow, 03, 173, 191; in 
table, 89; mentioned, 175, 176. 
Plectranthus albus, 
272. 
977 
214; men- 
Gürke, mentioned, 
Schimperi, Vatke, 272; mentioned, 
231. 
Wollastoni, S. Moore *, 272; men- 
tioned, 231, 
Pleurococcaceme from Tanganyika, 131. 
Plewrosigma attenuatum, W. Sm., 157. 
nodiferum, Grun., 157. 
Spenceri, W. Sm., var. nodifera, Van 
Heurck, 157. 
Pleurotienium, Näg., 110. 
ealdense, Nordst., 111. 
— — forma africana, G. S. West *, 111. 
coronatum, Rabenh., 110. 
Ehrenbergii, De Bary, 111. 
elatum, Borge, 111. 
