34 H. et J. Grovss: 
-42 mm. ÖOogonia pq. aggregata. Üoronula brevis. Oospora -3— 
-47 mm. longa, -3—-36 mm. lata, interdum tam lata quam longa. 
Membrana granulata. Monoica. 
Hab. in Sto. Domingo in Valle nuevo prope Constanza, alt. 
2100 m., Jun. 1910: H. von Türckheim n. 3405, pro parte. 
Distributio: America sept.: Columbia britann., Civit. unitae 
oceident., Mexico; America austr.: Peru, Bolivia, Chili, Argentina, 
Uruguay, Brasilia. 
A remarkable species very distinet in appearance owing to the rays 
being usually much swollen. It is the only known representative of Braun’s 
section heterophyllae of the division Monarthrodaetylae. Its discovery in the 
West Indies is the more interesting as in North America it occurs prinei- 
pally near the Western side and Dr. Arzen refers to it as a typically 
Pacific Coast species. 
6. Nitella axillaris A. Braun ö» Monatsb. Berl. Akad. 1858 p.356, 
- Fragmente t. I f. 33—38; Nordstedt in Hedwigia 1888 p. 182 et 194, 
in Act. Univ. Lund. XXV (1889) De Algis et Charac. p. 9. 
Statura mediocris. Caulis pq. erassus. Ramuli verticillorum steri- 
lium semel furcati, radiis secundariis 2—4, bicellularibus brevissimis 
et inconspicuis. Vertieilli fertiles in capitulis minutis congestis, axil- 
lares paene sessiles. Ramuli fertiles 7—8 brevissimi pq. 2plo furcati; 
radii ad furcam primam 4—5, quorum 2—3 simplices, 1—2 in 3—4 
radiis bicellularibus iterum furcati, cellulis ultimis er. -1 mm. longis, 
ad basin -04 mm. latis. Antheridia et oogonia ad furcam primam posita. 
Antheridia diametro cr. -27” mm. Oogonia pq. solitaria. Coronula 
parva. Oospora brunnea paulo complanata, -29—-34 mm. longa, 
.26— 3 mm. lata, 6—7 liras exhibens, membrana reticulata. Monoica. 
Hab. in Cuba: in Cafadas ad viam inter Mayari et Cuba sept., 
10. Aug. 1865: C. Wright, Santiago de las Vegas prov. Habana, 28. Jul. 
1904: Wilson n. 440; Portorieco prope Manati in paludosis, 9. April. 
1887: P. Sintenis n. 6618. 
Distributio: Asia: Java; America sept.: Mexico; America 
centr.: Guatemala; America austr.: Venezuela, Brasilia. 
N. axillaris resembles the European N. translucens. The form from 
Portorico and one of Wricnr’s Cuban specimens are very much smaller and 
more slender the branchlets being only about 8 mm. long. 
7. Nitella tenuissima Kuetzing Phye. Gen. (1843) p. 319, Tab. 
Phye. (1857) VII. t. 34 f. 2; Braun Fragmente p. 62; Nordstedt in 
Hedwigia 1888 p. 183. — Chara tenuissima Desvauz Journ. Bot. II 
(1809) p. 313. — N.byssoides Braun in Hook. Journ. Bot. 1849 p. 294. 
Statura parva. Caulis tenuissimus, pq. parum ramosus, inter- 
nodiis longis. Vertieilli condensati, paene globosi. Ramuli verticil- 
