CHARACE^. 



The Characese of Welwitsch's Herbarium were detei'mined by 

 Alexander Braun and included in his " Characeen Afrika's " (in 

 Monatsber. Pi^euss. Akad. Wissensch. Dec. 1867, pp. 782-800, 

 873-944 ; Berlin 1868). A few subsequent modifications ap- 

 peared in Braun's posthumous " Fi-agmente einer Monographie 

 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 BIy.ca 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. 496. 



2. N. huillensis A. Br. et Wehv. 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 caBspitose, 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 Ivauttila ; also in the Ema rivulet in 

 .Alonino ; with fr. 1 March and 11 April 1860. 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. Charac. p. 23 in Schweiz. 

 Cjesellsch. 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. 

 1859. No. 498. Growing in company with ^farxilea, and mixed with 

 .a few fragments of Chara aiigole)ids, in small sluggish streams, entirely 



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