759 



had been sent from Portugal in small boxes labelled " Pine- 

 tree fruits"; they realised I2s-I8s. per box (Gard. Cliron, 

 Sept. 30th, 1905, p. 249; Agric. News, Lc), Fruits ripened at 

 the Experiment Station, Trinidad, (March 1906) were described 

 as of excellent quality and much appreciated as a rare table 

 dehcacy (Bull. Misc. Inf. Roy. Bot. Gardens, Trinidad, 1906, 

 p. 73). 



May be raised from seed or jjropagated by cuttings, and 

 thrives in rich well drained soil. 



Cyrtosperma, Griff, 



Cyrtosperma senegalense, Engl; Fl. Trop. Afr. VIII. p. 198. 



IlL — Schott, Gen. Aroid, t. 85, ff. 1-10 {Lasimorpha sene- 

 galensis); Bot. Mag. t. 7617. 



Nupe (Barter), Old Calabar (Holland), Munchi Country 

 (Dalziel), Cameroons, Fernando Po and Lower Congo usually in 

 Swamps. 



6-12 



in 



LEMNACEAE. 



Lemxa, Linn. 



Lemna polyrhiza, Linn.; Fl. Trop. Afr. VIIL p. 201. 



IlL — FL Danica, ix. t. 1589; Lam. Encycl. t. 747; Rchb. 

 Ic, Fl. Germ. vii. t. 15, f. 17; Syme, Eng. Bot. ix. ed. 3, t. 1397; 

 Hegelmaier, Monogr. Lemnaceen, t. 13, ff. 10-16, tt. 14-15 

 (Spirodela polyrrhiza); Engl. & Prantl. Pflan. ii. pt. 3, pp. 164 

 & 154, ff. lOlA, 102 {Spirodela polyrrhiza). 



Greater Duckweed, 



Onitsha (Barter, No. 583, Herb. Kew), British East Africa 

 and widely distributed in warm and temperate countries. 



Found in ponds Onitsha (Barter, I.e.). 



It is suggested that the same value may be attributed to this 

 aquatic as to Lemna minor, Linn. (Fl. Trop. Afr. viii. p, 202), 

 the " Lesser Duckweed,'' also figured in the above mentioned 

 works, recorded from Eritrea, Abyssinia, and common through- 

 out the warm and temperate regions. Although so far not 

 collected in Nigeria may possibly occur there. This aquatic 

 weed has been recommended by Major Adie as a means of pre- 

 venting Mosquitos from laying their eggs on water and it is 

 stated that " tanks covered with it will never contain larvae of 

 CuHcidae [Mosquitos] whilst others at the same time of the year 

 are full of them" (Theobald, Monogr. Culicidae; Review in 

 Nature, Ixxvi. Sept. 5th, 1907, p. 467; BuU. Msc. Inf. Roy. 

 Bot. Gardens, Trinidad, Jan. 1908, p. 28). The plant is said 

 (I.e.) to be found in the Cedros district, Trinidad, though far 

 from common in the Island and it is suggested for use on 



