CHARA CONNIVENS. 59 



A slender, graceful plant, of medium size, sometimes attaining 

 a height of about two feet, but usually much shorter, a lightish 

 green and, though not much inorusted, generally very brittle. 

 Its principal distinctive characteristics are the markedly conni- 

 vent branchlets, especially those of the male plant, in which the 

 tips of opposite branchlets often cross one another, the long 

 remarkably conical coronula, the cells of which taper to a point, 

 the long cylindrical oospore, the short bract-cells and the rudi- 

 mentary stipulodes and spine-cells. The branchlet-segments are 

 often tumid. 



In this country it has only been found quite near the sea, but 

 in France and Spain it occasionally reaches inland. 



In southern countries, where the plant is more luxuriant, the 

 antheridia are much larger and the number of segments of the 

 branchlets more numerous. 



A hybrid with C. fragilis (C. connivento-fragilis Hy) has been 

 described from a locahty in Maine-et-Loire. This plant, which 

 closely resembles C. connivens, has the upper whorls bearing 

 antheridia only, with some fruits with antheridia on the lower ones. 



14. Chara fragifera Duxieu. 

 (Plate XLII.) 



Chara fragifera Dubibtj de Maison nbutb in Bull. Soc. Bot. Prance, 



Vi, p. 185 (1859) ; VII, p. 627 (I860). 

 Olatatjd in Bull. Soc. Bot. Prance, X. p. 140, tab. 3, f. 19, 20 



(bulbils) (1863). 

 Bkaxtn in Monatsb. Akad. Berl. for 1867, p. 935 (1868). 

 Tkimen in Journ. Bot. XY, p. 353, tab. 192 (1877). 

 H. & J. Groves in Journ. Bot. XVIII, p. 102, tab. 207, f. 2 (1880). 

 Beaun & NoBDSTBDT Fragm. Mon. Cliarac. (1882), p. 180. 

 Sydow Europ. Cliarac. (1882), p. 91. 



BoswBLL English Botany, ed. 3, XII, p. 217, tab. 1922 (1884-5), 

 Lloyd & Eoucattd F1. de I'Ouest de la France, ed. 4, p. 439 (1886). 

 NORDSTBDT in Lund's Univ. Arsskr. XXV, p. 37 (1889). 

 MIGUIA Die Charaoeen, p. 695, f. 139-41 (1897); Syn. Charac. 



Europ., p. 149, f. 14, 124-6 (1898). 

 GiBSBNHAGBN Untersucli. li. d. Oharaceen, I, pp. 35-6, f. 18-20 



(bulbils) (1902). 

 Prosper Oarofit. de Espan. (1910), p. 159, f. 26a, p. 162. 

 Hy in Bull. Soc. Bot. Prance, LX, Mem. 26, p. 40 (1913). 

 C. tricliophylla KiJTZ in Henriqties, Contrib. Flor. Crypt. Lusit. 



(1881), p. 21 (fide Nordstedt). 



Exsiccata: — Billot 3273; Braun, Rabenh. & Stiz. 73a, &; Groves 

 4-6 ; Lloyd 416-7 ; Migula 129 ; Gr. & B.-W. 20, 21. 



Dioecious. Stem slender, flexuous, producing laterally 

 at some of the lower nodes, as well as at the root-nodes, 



