Salix] CXX. SALICINE^. 1031 



at the base of Serra de Xella, near Bumbo, plentiful ; without fl or fr. 

 Oct. 1859. No. 6334. At a stream in Chao da Xella ; male fl. Oct. 

 1859 in company with Venionia podocoma Schultz Bip. (Welw. herb, 

 no. 3263 ; ante, p. 539). No. 6332^. ^ , ^ ^ ^. u ^ 



HuiLL\— An arborescent, virgately branched shrub ; branches and 

 branchlets reddish yolk of egg coloured ; leaves herbaceous-green and 

 somewhat shining above, whitish beneath ; stamens 6 or rarely 7 ; 

 filaments monadelphous at the very base. At the banks of nvers and 

 streams about Lopollo, Monino, and the Ivantala lake, plentiful, about 

 3000 to 4000 ft. alt., in company with species of Eugenia (cf. E. guine- 

 ensh, var. huilleusis, Welw. herb. no. 4403), Nesasa passermmdes 

 Koehne (cf. Welw. herb. no. 2336), and a Proteacea, Faurea saligna 

 Harv (Welw herb. no. 1592) ; male fl. Jan. and March 1860 ; female 

 fl and f r April 1 860. The shrub rather rarely fruits, for staminif erous 

 specimens were frequently seen all the way from Bumbo to the 

 Ivantfda lake, but pistilliferous ones only in one place, namely at 

 Monino. No. 6332. In wooded places at Monino by streams, in 

 company with the willow-like Probeacea, Faurea sahgna Harv. (Welw. 

 herb no 1592) ; fr. March 1860. It is singular that the leaves on the 

 shoots which bear the female catkins are alwajs more or less obtuse at 

 the apex, while the rest of the leaves on the same branches have a long 

 acumen like those on the male plants. No. 6333. 



CXXI. CERATOPHYLLE^. 

 1. CERATOPHYLLTJM L. ; Benth. & Hook. f. Gen. PL iii. p. 415. 

 ' 1. C. demersum L. Sp. PL, edit. 1, p. 992 (1753); Camel in 

 NTiiovo Giorn. Bot. Ital. viii. p. 28. t. 3 (Jan. 1876). 



G. vulgare Schleid. in Linnaea xi. p. 540. t. 11 (1837); J3enth. 

 in Hook. Niger Fl. p. 525 (1849). 



Barra do Dande.— Leaf-segments toothed. In pools at the river 

 Dande, without fl. or fr., rather rare, Nov. 1853, in .company with 

 Pidia Stratiotes L., var. ohcordata Engl, (cf post, ii. p. 8o), and 

 another aquatic plant with a Myriophyllaceous habit. No. 524. 



Barr\ DO Bengo.— A form with the leaf -segments strongly toothed. 

 In the large lake called Lagoa de Quifandongo, at the mouth of the 

 river Bengo, without fl. or fr. Dec. 1853, in company with A^^a. 

 WelwM^i Rendle, post, ii. p. 95 (1899), Welw. herb no. 247. No 525. 



IcoLo E Bengo.— Leaf -segments somewhat toothed. In the large 

 lake called Lagoa de Quilunda, without fl. or fr. 14 Sept 1854, in 

 company with CastaUa mystka Salisb., var. dentata (Welw. herb, 

 no. lid -.ante, pp. 22, ^^Vi), Pi di a Stratiotes I.. (Welw. herb.no.214) 

 Lemna paucicostata Hegelm. (Welw. herb. no. 213 ; post ii. p. Jl), 

 and WoJffia Michelii Schleid. (Welw. herb. no. 211 ; post, ii. p. 92). 



PuxGO Andongo.— Leaf -segments somewhat toothed; fruit 4- in. 

 long surmounted with a slender style about the same length, long- 

 spurred near the base. In the river Cuije not far from its junction 

 with the river Cuanza, also near Sansamanda on the Cuanza, plentiful, 

 fl. and fr. March 1857, in company with Cadidia mystim bahsb., var. 

 dentata (Welw. herb. no. 1165, and Azolla (Welw. herb. no. 38). 



The specimens that are not provided with fruit are difficult to 

 distinguish from the subspecies C. submersum L. bp. PL, edit, z, 

 p. 1409 (1763). 



