998 



MISC. PUBLICATION 200, U. S. DEPT. OF AGRICULTURE 



species included had been referred. Pholiurus 

 Trin. is based on a single species, P. pan- 

 nonicus (Host) Trin., in which the rachis is 

 continuous, the spikelets falling alone at 

 maturity (as in Scribneria) . 



Low annuals with slender cylindric spikes. 

 Species 4, in the Eastern Hemisphere, one 

 introduced in the United States. 



(60) CORYNEPHORUS Beauv. 



Type species: Corynephorus canescens (L.) 

 Beauv. 



Weingaertneria Bernh., Syst. Verz. Pflanz. 

 23: 51. 1800. A single species, W. canescens 

 (L.) Bernh., based on Aira canescens L., is 

 included. 



Corynephorus Beauv., Ess. Agrost. 190. 

 1812. Two species are included, C. articulatus 

 (Desf.) Beauv., based on Aira articulata 

 "Lin." (error for Desf.). and C. canescens 

 (L.) Beauv., based on Aira canescens L. 

 The latter species, being illustrated, is 

 taken as the type. 



(62) HELICTOTRICHON Besser 



Type species: Avena sempervirens Host. 



Elictotrichon Bess, ex Andrzej., Rys. Bot. 

 9. 1823. Undescribed; E. sempervirens 

 Bess., presumably based on Avena semper- 

 virens Host, is included in a list of plants. 



H elictotrichon Bess, in Schult., Mantissa 

 3. (Add. 1): 526 (error 326). 1827. A generic 

 description is given and five species listed, 

 u Av. sempervirens Host, versicolor Vill., 

 pratensis L., pubescens L., planiculmis 

 Schrad." None are here transferred to 

 H elictotrichon, but all have been transferred 

 in recent years. In Schur, Enum. PI. 

 Transsilv. 762. 1866, the name is mis- 

 spelled " Heliotrichum. ,} 



Avena sect. Avenastrum Koch, Syn. Fl. 

 Germ. Helv. 795. 1837. Six species are 

 included, A. planiculmis Schrad., A. pube- 

 scens Huds., A. alpina J. E. Smith, A. 

 pratensis L., A. versicolor Vill., and A. 

 sempervirens Vill., all European and all 

 later transferred to H elictotrichon. 



Avenastrum Jessen, Deutschl. Graser 

 214. 1863. Presumably based on Avena, 

 sect. Avenastrum., but Koch is not mentioned 

 except in the list of authors (p. 297). Besides 

 2 species included by Koch, A. pubescens 

 and A. pratense, Jessen transferred one 

 species of Trisetum, one of Arrhenatherum, 

 and two of Aira to his Avenastrum. 



Heuffelia Schur, Enum. PI. Transsilv. 

 760. 1866. "Avena sect. II. Avenastrum 

 Koch" is cited and 12 species listed. 



Numerous perennials of Eurasia and 

 Africa, one introduced and two native in 

 western North America. 



(65) SIEGLINGIA Bernh. 



Type species: Sieglingia decumbens (L.) 

 Bernh. 



Sieglingia Bernh., Syst. Verz. Erf. 20, 

 44. 1800. A single species is included, Sieg- 

 lingia decumbens (L.) Bernh., based on 

 Festuca decumbens L. 



The genus consists of a single tufted 

 perennial of Europe and British America, 

 recently found in northern Washington. 



(70) APERA Adans. 



Type species: Agrostis spica-venti L. 



Apera Adans., Fam. PI. 2: 495. 1763. 

 "Agrostis 1. Lin. Sp. 61" is cited. The first 

 species of Agrostis in Linnaeus, Species 

 Plantarum, is "A. spica venti." 



Anemagrostis Trin., Fund. Agrost. 128. 

 1820. Two species, Agrostis spica-venti L. 

 and A. interrupta L., are included. 



The genus consists of two annuals of 

 Eurasia, both introduced in the United 

 States. Previously included in Agrostis. 



(86) HELEOCHLOA Host ex Roemer 



Type species: Heleochloa alopecuroides (Pill, 

 and Mitterp.) Host. 

 Heleochloa Host ex Roemer, Collect. 

 Rem. Bot. 233. 1809. Generic description 

 given for Heleochloa Host, Icon. Gram. 

 Austr. 1: 23. pi. 29. 1801, including H. 

 alopecuroides (Pill, and Mitterp.) Host and 

 H. schoenoides (L.) Host, described and 

 figured by Host but without generic de- 

 scription. Roemer includes the same species. 



(102) MICROCHLOA R. Br. 



Type species: Microchloa setacea (Roxb.) 

 R.Br. 



Microchloa R. Br., Prodr. Fl. Nov. Holl. 

 208. 1810. A single species is included, 

 Microchloa setacea (Roxb.) R. Br., based on 

 Rottboellia setacea Roxb. 



Wiry annuals or perennials with slender 

 curved spikes. Several species in Africa and 

 Australia, one introduced and one native in 

 America. 



EHRHARTA Thunb. 



Type species: Ehrharta capensis Thunb. 



Ehrharta Thunb., Svensk. Vet. Akad. 

 Handl. 40: 217, pi. 8. 1779. A single species 

 is included, Ehrharta capensis Thunb., of 

 South Africa. 



Trochera L. C. Rich., Jour, de Phys. 

 (Obs. Phys.) 13: 225, pi. 3. 1779. A single 

 species is included, Trochera striata L. C. 

 Rich., a garden plant from unknown source, 

 referred by Stapf to Ehrharta bulbosa 

 Smith. Though the title-page date is the 

 same, Kuntze (Rev. Gen. PI. 2: 795. 1891) 

 gives March for month of publication for 

 Trochera and July-September for Ehrharta. 



Placed in Phalarideae, having a pair of 

 sterile lemmas below the single fertile floret, 

 the sterile lemmas exceeding the glumes and 

 usually the fertile floret. Species numerous 



