300 CLVI. CYPERACEZ (CLARKE). [ Pycreus. 
3500 ft., Scott-Elliott, 5334! Cameroons: Yaunde, 2600 ft., Zenker & Staudt, 
336 ! 
Wile Land. British East Africa: Jur; Jur Ghattas, Schweinfurth, 1462! 
Buddu district, Scott-Elliot, 7516! 
South Central. Congo Free State: Ntenke, Briart ! 
Mozamb. Dist. German East Africa: Urundi district, 4000-5000 ft., Scott- 
Elliot, 8182! British Central Africa: Nyasaland; Shire Highlands, Buchanan ! 
Scott-Elliot, 8508 ! and without precise locality, Buchanan, 1452! 
Also in Bourbon, South-east Asia, Malaya and Australia. 
The species nilagiricus was originally grounded on the black-chestnut colour, while 
my var. nilagirica includes all the narrow spikeleted heads whatever the colour. All 
the Tropical African material has narrow spikelets with exactly parallel sides, and 
is chestnut-brown to chestnut-black. P. betschuanus differs in the prominent long 
stolons. The Cameroon plant, issued from Berlin as Cyperus globosus, Allioni 
is exactly the common form of C. nilagiricus in India. 
21. P. propinquus, Nees in Mart. Fl. Bras. ii. i. 7. Stolons 0 
Stems 12-18 in. long, rather slender. Leaves nearly as long as the 
stems, { in. broad. Spikelets 10-16 in one compound head, pale 
yellow; bracts 3, lowest 3-7 in. long and similar to the leaves. 
Spikelets 4 by } in., 20-36-flowered, compressed, sides parallel. 
Glumes ovate, one-coloured, hardly acute, a little inflated. Nut 3 the 
length of the glume, obovoid, apiculate, chestnut-coloured, not trans- 
versely muricate.—C. B. Clarke in Durand & Schinz, Conspect. Fl. 
Afr. v. 541; Durand & Schinz, Etudes FI. Congo, i. 281; Urban, Symb. 
Antill. ii. 18. P. monocephalus, C. B. Clarke in Durand & Schinz, Con- 
spect. Fl. Afr. v. 538. Cyperus lanceolatus, Poir. in Lam. Encycl. vii. 
245; Kunth, Enum. ii. 9; Boeck. in Linnea, xxxv. 442 ; C. B. Clarke 
in Journ, Linn, Soc. xx. 279 and xxi. 42; Ridley in Trans. Linn. Soe. 
ser. 2, Bot. ii. 125; not of Presl. C. olfersianus, Kunth, Enum. ii. 10 ; 
Boeck. in Linnea, xxxv. 439; C. B. Clarke in Journ. Linn. Soc. xxi- 
62 partly; not Pycreus olfersianus, Nees. ('. pycnocephalus, Steud. 
Syn. Pl. Glum. ii.5. C. Jluminalis, Ridley in Trans. Linn. Soc. ser. 2, 
Bot. ii. 127; Rendle in Cat. Afr. Pl. Welw. ii. 106. C. flavescens, 
var. abyssinica, C. B. Clarke in Journ. Linn. Soc. xx. 279. 
Upper Guinea. Senegal, Perrottet! Sierra Leone, Scott-Elliot, 51874 | 
Cameroons: Yaunde, 2600 ft., Zenker & Staudt, 335! 
, Mower Guinea, Mouth of the Congo, Smith, 62! Lower Congo: by the 
River Ntombi, near Lutete, 1500 ft., Hens, A, 250! 
South Central. Congo Free State, Butaye ! 
é Moxamb. Dist. British Central Africa: Nyasaland; Namasi, Cameron 
Also in the Mascarene Islands and Tropical America. 
I can only tell this species from 1-headed examples of P. flavescens, Reichb., by 
the nut being perfectly smooth, i.e. without a trace of longitudinal superficial cells 
(and consequent transverse markings) which mark the nut of P. flavescens. 
22. P. capillifolius, C. B. Clarke in Durand &: Schinz, Conspect- 
fl. Afr, v. 535. Annual. Stems tufted, 4-8 in. long, very slender. 
