526 ADDENDA. 
I have not seen a specimen of this; it is stated to be allied to W. longipes, Mart., 
but easily distinguished by its shorter peduncles. 
1. Medemia Argun, P. G. von Wiirttemberg. Add; Areca? 
Passalacque, Kunth. in Ann. Sc. Nat. 1 sér. viii. 420; Hemsley in 
Nature, xxviii. (1883) 111. 
5a. Aponogeton hereroensis, Schinz in Bull. Herb. Boiss. 2, 
sér. i. 764. A small plant arising from a thickened base. Leaves 
petiolate, about 3 in. long, either narrowly linear, 1 lin. or more broad 
and gradually tapering at the base, or oblong-elliptic, 5 lin. broad and 
suddenly contracted at the base, flaccid, acute. Spikes 9 lin. long, 
dense-flowered. Male flowers not seen. Female flowers: Petals 
broadly elliptic, 14 lin. long, 1 lin. broad, white, delicate. Carpels 6; 
styles about 1 lin. long ; stigmas brown. 
Lower Guinea. (rman South-west Africa: Hereroland; pool east of Wind- 
hoek, Dinter, 589, plain north of Waterberg, Dinter. 
25a. Kyllinga Pilicula, C. B. Clarke. Glabrous. Roots fibrous. 
Stem 1 ft. long, thread-like, not thickened at the base. Leaves thread- 
like, one as long as the stem. Head of 1 globose white spike, } in. in 
diam., of about 12 spikelets; lower bract as if continuing the stem, 
3 in. long, thread-like; upper bract 3 in. long, pendent, thread-like. 
Spikelets each perfecting one nut. Nut-bearing glume ovate, hardly 
acute, strongly nerved, not scabrous on the wingless keel. Nut flat, 
round, ellipsoid. 
Lower Guinea. Lower Congo: Kisantu; on the Inkissi River, Gillet, 439! 
12a. Pycreus chorisanthus, (. B. Clarke. Annual. Stems 
4-8 in. long, very slender. Leaves long, very slender. Umbel of spikes 
simple, rays 1-4, up to 1? in. long; bracts 3—4, very slender, lowest 
3-8 in. long. Spikelets 3-6 in a spike, } by ;4, in., 6-flowered, very 
flat, green to yellowish. Glumes standing far apart, keeled, mucronate. 
Style (including its two branches) much shorter than the nut. Nut 3} 
the length of the glume, unequal-sided, oblong-obovoid, flattened, dark 
brown ; outermost cells subquadrate. 
Lower Guinea. German South-west Africa: Hereroland, Dinter! 
The examples seen were raised in the Ziirich Botanic Garden. The species 1s 
allied to P. pumilus, Nees (i.e. Cyperus hyalinus, Vahl), but the spikelets and glumes 
are much smaller. 
4a, Mariscus oblongi-nux, (. B. Clarke. Glabrous. Basal 
bulbs large, ovoid, in clusters. Stems 15 in. long, rather stout. Leaves 
4-8 by £ in. Inflorescence of one ovoid dense pale head, $—} in. in 
diam.; bracts 3-4, lowest 1-2 in. long. Spikelets very numerous, per- 
fecting 1 or 2 nuts. Flower-glume straw-coloured, 4 in. long, thin, 
aaa Nut ;5 in. long, oblong; style short, branches 3, very 
elicate. 
Mozamb. Dist. British Central Africa: Nyasaland ; Namasi, Cameron, 90! 
