NITELLA CAFILLARIS. 97 



C. gracilis WahlenbbkgFI. Suec. p. 694 (182,6) fide Braun (non Smith). 

 Nitella capitata Agaedh Syst. Alg. p. 125 (1824). 



Wallman Porsok syst. Ohai-ac. p. 37 (1853) ; Transl. p. 32 (1856). 



"Wahlstedt Bidrag Skand. Charac. p. 8 (1862) ; Mon. Sver. & Norg. 

 Oharac. p. 15 (1875) (misprinted capita). 



NoRDSTEDT in Bot. KTotiser, 1863, p. 34. 



Okepin in Bull. Soc. Bot. Belg. II, p. 130 (1863). 



Rabenhoest Kiypt. PI. Sachs. I, p. 287 (1863). 



Leonhakdi in Verh. Nat. vev. Briinn, II, p. 166 (1864). 



Braun in Monatsb. Akad. Berl. for 1867, p. 873 (1868) ; in Cohn, 

 Krypt. rior. Schles. I, p. 396 (1876). 



MiJLLBR in Bull. Soc. Bot. Geneve, II, p. 49 (1881). 



Bratjn & NoRDSTBDT Fragm. Mon. Oharac. p. 31 (1882). 



Stdow Europ. Charac. p. 12 (1882). 



Groves in Journ. Bot. XXIV, p. 3, t. 264 (1886). 



MiGTJLA Die Chavaceen, p. Ill, f. 31-34 (1890) ; Syn. Charac. Europ. 

 p. 29, f. 19-22 (1898). 



Pilarskt-Nandor Charac. Ungarn. p. 120, f. 17 (1893). 



HoLTZ Characeen in Krypt. Mark-Brandenb. p. 70 (1903). 



Prosper Carofit. Espaii. p. 64, t. 10a (1910). 



Hy in BuU. Soc. Bot. Prance, LX, Mem. 26, p. 7 (1913). 

 N. syncarpa vars. capitata & glceocephala Ktjtzing Phyc. Germ. p. 256 



(1845). 

 N. syncarpa vars. capitata & oxygyra Babenhorst Deutsch. Krypt. PL 

 II, p. 195 (1847). 



Bratjn in N. Denks. Sohweiz. Ges. Naturw. X, p. 7 (1849) (misprinted 

 oxygyna). 

 N. syncarpa var. capitata Boswell Engl. Bot. ed. 3, XII, p. 177 (1884). 



ExsiccATA : — Areschoug 300 ; Billot 1986-7 ; Braun, Rabenh. & 

 Stiz. 26-28, 104 ; Desmazieres II, 319 ; Groves 30 ; Nielsen 2, 3, 48 

 {fide Wahlst.) ; Nordstedt & Wahlstedt, 3, 4. 



Dioecious. 8te77i rather slender, the internodes some- 

 times, though not usually, twice as long as the branch- 

 lets. J^Hiorls of 6-9 branchlets. BrancMets once 

 forked, the primary and secondary rays usually of 

 nearly equal length; secondary rays 2-4, one-celled, 

 apex extremely variable, sometimes quite blunt, but 

 usually abruptly or gradually narrowed into an acumi- 

 nate (sharp) point. Fertile whorls mostly with very 

 short branchlets forming dense heads. Oogonia and 

 antheridia surrounded by an amorphous gelatinous 

 envelopment. Oogonia 2 or 3 together or solitary, 

 c. 550-575 /x long, c. 425-450 /x broad; spiral cells 

 showing usually 7 convolutions, becoming swollen at 

 the apex; coromiZa c. 25-35 /x high, deciduous. Oospore 

 c. 375-400 fjL long, 325-375 ix broad, 300 /* thick, 



VOL. I. 7 



