CHARACE^E. 
The Characese of Welwitsch's Herbarium were determined by 
Alexander Braun and included in his " Characeen Afrika's" (in 
Monatsber. Preuss. Akad. Wissensch. Dec. 1867, pp. 782-800, 
873-944 ; Berlin 1868). A few subsequent modifications ap- 
peared in Braun's posthumous " Fraginente einer Monographic 
der Characeen," edited by Dr. Otto Nordstedt in Abhandl. Konigl. 
Akad. Wissensch., pp. 211, tt. 7; Berlin 1882. 
1. NITELLA Agardh Syst. Algar. p. xxvii. (1824). 
1. N. leptoclada A. Br. in Berlin. Monatsber. Preuss. Akad 
Dec. 1867, p. 880 (1868). 
Huilla. — In company with species of Ottelia and Blyxa in very 
deep woodland ponds near Lopollo, at the spot where the Munanos 
pitched their camp ; with fr. May 1860. No. 499. 
Loanda. — Rather rare at the sides of deep rain-water pools near the 
country house (Museque) of Luiz Gomes in the plain above Loanda 
(not seen by Welwitsch in 1853-4) : with unripe fr. 10 Jan. 1858. 
No. 495. 
2. N. huillensis A. Br. et Welw. in Berlin, Monatsber. Preuss. 
Akad. Dec. 1867, p. 892 (1868); confer tab. vi. fig. 164 in Berlin. 
Akad. Abhandl. 1882. 
Huilla. — Growing in mud or on small stones under running water ; 
fronds csespitose, monosiphoneous, shining when dry ; ramifications 
bearing fruit, and coated with a hyaline substance of a Nostochoid- 
brown appearance, and fused into a globule. Common in the Mupanda 
rivulet, which flows into Lake Ivantala ; also in the Ema rivulet in 
Monino ; with fr. 1 March and 11 April i860. No. 496. 
2. CHARA Vaill. ; Agardh. Syst, Algar. p. xxvii. (1824). 
1. C. fcetida A. Br. in Ann. Sci. Nat, Ser. 2. I. p. 354 (1834) ; 
Flora xviii. i. p. 63 (1835). 
Var. subinermis A. Br. Schweiz. Oharac. p. 23 in Schweiz. 
Gesellsch. Neue Denkschr. x. (1849); in Berlin. Monatsber. 
Preuss. Akad. Dec. 1867, p. 942. 
MOSSAMEDES. — In ponds alongside the banks of the river Bero near 
the town of Mossamedes ; a single specimen, June 1859. No. 500. In 
pools by the banks of the river Caroca (Croque) near Cabo Negro 
(16° S. lat.), 12 geographical miles' distance from the mouth of the 
river ; abundant in the river near S. Joao de Croque ; with fr. 2 Sept. 
] S.V.i. No. 498- Growing in company with Marsilea, and mixed with 
a few fragments of Chara angolensis, in small sluggish streams, entirely 
