334 F- Fedde und K. Schuster: Index novorum Siphonogamorum. [22 



var. villosus Drob. 1. c. p. 237. ■ — Irkutsk. 



var. bargusinensis Drob. 1. c. p. 237, Tab. XVII, Fig. 2. — Transbaicalia. 

 var. pauciflorus Drob. 1 c. p. 238 (=^ B. ciliatus L. var. glabrior Regel). 

 — Irkutsk. 

 Bromiis Korotkyi Drob. 1. c. p. 238, Tab. XVIII, XIX, A II et B 5. — 

 Transbaicalia. 



B. (Megalachne) masafueranus Skottsberg et Pilger in Fedde, Rep. XVI (1920) 



p. 385. — Juan Femaudez (Skottsberg u. 415). 

 Calamagrostis Langsdorffii (Link) Trin. var. piligera Litw. in Trav. Mus. Bot. 



Acad. Sei. Russie XVIII (Petrograd 1920) p. 52. 



var. acuminata Litw. 1. c. p. 52 ( = C. canadensisV .^ . var. acuminafa Vasey ). 

 Ceratochaete Lunell nom. nov. in Amer. Midi. Nat. IV (1915) p. 214 (= Zf- 



zania L., non Zizanion). 



C. aquatica (L.) Lunell 1. c. p. 214 {= Zizania aquaüca L.). • — N. -Dakota. 

 Chaetociüoa Poiretiana (Schult.) Hitchc. in Contr. U. S. Nat. Herb. Washington 



XXII, Part 3 (1920) p. 159, Fig. 37 (= Panicum elongatum Poir. = P. 

 sulcatum Bertol. = Setaria sulcata Raddi = P. Poiretianiim Schult. = P. 

 speciosum Nees = P. crus ardeae Willd. = Setaria Poiretiana Kunth = S. 

 crus ardeae Kunth = Panicum flabellatum Steud. = Chamacraphis jiier- 

 gensii [jurgensenii] Ktze.). — Mexico to Brazil. 



Ch. palmijolia (Willd.) Hitchc. et Chase 1. c. p. 161 (= Panicum plicatum 

 Willd. = P. palmifolium Willd. = P. plicatum haitiense Kunth = Chamac- 

 raphis palmifolia Ktze. = Setaria palmijolia Stapf). • — Jamaika (Hart 

 n. 815, Hitchcock n. 9719, Harris et Lawrence n. 15 232, Hitchcock n. 9762, 

 Harris n. 11535, Hitchcock n. 9727, Harris n. 10911. 11286, Nichols n. 37). 



Ch. tenax (L. Rieh.) Hitchc. 1. c. p. 176, Fig. 42 (= Panicum tenax L. Rieb. 

 = P. Impressum Nees = Setaria impressa Kuntb = S. tenax Desv. = 

 Panicum sphaerocarpum Salzm. = P. amphibolum Steud. = P. inter- 

 medium Salzm. = Setaria biconvexa Griseb. = Chaetochloa Salzmanniana 

 Hitchc. = Ch. impressa Hitchc. et Chase = Setaria sphaerocarpa Hubbard). 

 — Mexico and West Indies to Brazil. 



Ch. Scheelei (Steud.) Hitchc. 1. c. p. 207, Fig. 62 (= Setaria polystachya Scheele, 

 non Schrad. = Panicum Scheelei Steud. = Chaetochloa polystachya Scribn. 

 et Merr.). — Texas. 



Chalcoelytnim Lunell nom. nov. in Amer. Midi. Nat. IV (1915) p. 212 (= Chryso- 

 pogon Trin. = Sorghastrum Nash). 



Ch. nutans (L.) Lunell 1. c. p. 212 (= Sorghastrum nutans [L.] Nash = Sorghum 

 avenaceum [Michx.] Chapm.). — North Dakota. 



Coix palustris Kds. in Bull. Jard. Bot. Buitenzorg, 3. Ser. I (1919) p. 157. — . 

 West-Java (Koorders n. 40590). 



C. Ouwenhandii Kds. 1. c. p. 191, Tafel XX. — Sumatra (Ouwenband n. 147), 



Comniolinidhiin Stapf gen. nov. in Flor. Trop. Africa IX, Pt. 4 (1920) p. 627. 

 My observations on the affinity of Acroceras may be applied with 

 even greater force to Commelinidium. which. should liave been placed 

 between Chloachne and Microcalamus. The curious dorsal semilunar 

 depression at the base of the fertile valve corresponds to a very consider- 

 able reduction of tissues, and in the mature itate frequently leads to 

 a rupturo along its line. The port.ioji of the valve immediately insido 

 the Itue bulges slightly. The same structure occurs in Chloachne and 

 Microcalamus and is also faiutly indicated in some forms of Acroceras^ 



