MANUAL OF THE GRASSES OF THE UNITED STATES 



997 



14 mm. long, acuminate, glabrous; {the 

 lemmas 7 to 9 mm. long, apiculate, the 

 margins conspicuously white-villous except 

 the apex; palea deeply sulcate between the 

 arched keels, the margins conspicuously 

 white-villous; caryopsis readily falling, 

 brown, 4 mm. long, 2 mm. wide, the embryo 

 conspicuous; anthers 3.5 mm. long, pale. 

 Ql — Sand hill, altitude 3,050 feet, Eureka 

 Valley, Inyo County, Calif. 



(33) TRIDENS Roem. and Schult. 



Type species: Tridens quinquifidus (Pursh) 

 Roem. and Schult. (Tridens flavus (L.) 

 Hitchc.) 



Tricuspis Beauv., Ess. Agrost. 77, pi. 15, 

 f. 10. 1812. Not Tricuspis Pers., 1807. 

 Tricuspis caroliniana Beauv., the species 

 illustrated, is taken as the type. This is 

 Tridens flavus (L.) Hitchc. Two other names 

 mentioned are nomina nuda. 



Tridens Roem. and Schult., Syst. Veg. 2: 

 34, 599. 1817; Tricuspis Beauv., pi. 15. 

 f. 10 is cited on page 34, and Tridens 

 quinquifida Roem. and Schult., based on 

 Poa quinquifida Pursh, is published on 

 page 599. 



Windsoria Nutt., Gen. PI. 1: 70. 1818. 

 Two species are described, W, poaeformis 

 Nutt., which is Tridens flavus, and W. 

 ambiguus (Ell.) Nutt. The first is selected as 

 the type. 



Erioneuron Nash in Small, Fl. Southeast. 

 U. S. 143. 1903. The type, Uralepis pilosa 

 Buckl. (Tridens ptlosus (Buckl.) Hitchc), 

 is indicated on page 1327. Only one species 

 is included. 



Dasyochloa Willd. ex Rydb., Colo. Agr. 

 Expt, Sta. Bui. 100: 18, 37. 1906. There is 

 no description except in the key. Dasyochloa 

 pulchella Willd. is listed in Steud.' Nom. 

 Bot. ed. 2. 1: 484. 1840, as synonym of 

 Uralepis (" Uralepsis") pulchella Kunth 

 (Tridens pulchellus (H. B. K.) Hitchc.) 

 and is the only species included in the genus 

 by Rydberg. 



Perennials, diverse in habit and spikelets, 

 which have been included in Triodia R. 

 Br., of Australia and New Zealand, which 

 also consists of species with somewhat di- 

 verse spikelets. Tridens differs from that in 

 the strictly 3-nerved lemmas, the lateral 

 nerves marginal or nearly so, the lemmas of 

 Triodia being mostly in 3 groups of 2 or 3 

 nerves each (sometimes indistinct), the 

 lateral nerves not marginal. 



In habit the species of Triodia are very 

 different from those of Tridens, being tus- 

 sock grasses with rigid pungently pointed 

 blades. Tridens is confined to the western 

 hemisphere. Two new combinations are 

 necessary, see pages 971, 973. 



(35) NEOSTAPFIA Davy 



Type species: Stapfia colusana Davy. 



Stapfia Davy, Erythea 6: 110, pi. 3. 

 1898. Not Stapfia Chodat, 1897. A single 

 species included, Stapfia colusana Davy. 



Neostapfia Davy, Erythea 7: 43. 1899. 

 Change of name for Stapfia, the species re- 

 named Neostapfia colusana (Davy) Davy. 



Davyella Hack., Oesterr. Bot. Zeitschr. 49: 

 133. 1899. Change of name for Stapfia 

 Davy, the species renamed Davyella colusana 

 (Davy) Hack. 



The one species, confined to California, 

 was included in the related South American 

 genus, Anthochloa Nees, by Scribner (U. S. 

 Dept. Agr., Div. Agrost. Bui. 17: 221, f. 517. 

 1899). In Anthochloa the leaves are differen- 

 tiated into sheath and blade as in other 

 grasses, the axis of the inflorescence is not 

 extended and foliaceous as in Neostapfia, 

 and the glumes are developed and persistent. 

 (See R. F. Hoover, West. Bot. Leaflets 11: 

 274. 1940.) 



(40) ENNEAPOGON Desv. 



Type species: Enneapogon desvauxii Beauv. 



Enneapogon Desv. ex Beauv., Ess. Agrost. 

 81, pi. 16, f. 11. 1812. Enneapogon des- 

 vauxii Beauv. and four species described by 

 Robert Brown under Pappophorum are 

 included, E. desvauxii being the only one 

 illustrated. No locality is here given, but in 

 a later paper by Desvaux. (Jour, de Bot. 1 : 

 70. 1813.) "iles Manilles" was erroneously 

 given for the locality. What is undoubtedly 

 part of the type collection was recently 

 found in the British Museum and proves to 

 be the American species known as Pappo- 

 phorum wrightii S. Wats., with which 

 Beauvois' illustration agrees. The collection 

 was probably made by Nee near Mendoza, 

 Argentina, where the species is still found. 

 See Burbidge, N. T., Linn. Soc. London 

 Proc. 153 Sess (1940-41): 52-91, f. 1-5. 

 1941; also Chase, A., Madrono 8: 187-189. 

 1946. 



Tufted perennials of subarid regions of 

 Asia, Africa and Australia, one species in 

 America. 



(51) MONERMA Beauv. 



Type species: Monerma monandra Beauv. 



Monerma Beauv., Ess. Agrost. 116, pi. 20, 

 f. 10. 1812. Three names are listed. Mo- 

 nerma monandra Beauv., the species illu- 

 strated, is taken as the type. This is the 

 same as M. cylindrica (Willd.) Coss. and 

 Dur. (See p. 898. ) This species has common- 

 ly been included in Lepturus R. Br., the 

 type of which is L. repens (G. Forst.) R. 

 Br. of Australia and the Pacific islands. 

 Monerma consists of a single species of the 

 Mediterranean region, introduced in America. 



(52) PARAPHOLIS C. E. Hubbard 



Type species: Parapholis incurva (L.) C. E. 

 Hubbard, based on Aegilops incurva L. 

 Parapholis C. E. Hubb., Blumea Sup. 3 

 (Henrard Jubilee vol.): 14. 1946. Differen- 

 tiated from Pholiurus, to which the four 



