100 PANICACE^. 



Some of the plants, when only 15 cm, high, with no panicle 

 above, produce subterranean fertile spikelets. 



Specimens collected on the pine-barrens, New Jersey, in 1884. 



New Jersey to Florida. 



"3. A. Floridanum (Chapm.) Amphicarpiim Floridanum Chap- 

 man, Fl. S. States 572 (1860). 



An erect pale green perennial, 30-90 cm. high, branching below 

 from creeping rootstocks. Sheaths fringed on the margins ; blades 

 linear-lanceolate, rigid, nearly smooth. Panicle thin and narrow, 

 10-20 cm, long, containing spikelets which are lance-elliptical, 6-7 

 mm. long. Empty glumes 3, first 1-2 mm. long, second and third 

 nearly equal, 7-8-nerved; floral glume membranous, 5-7-nerved, 

 its palea with 1-2 nerves toward each margin. Subterranean spike- 

 lets not seen. Anthers of the radical flowers imperfect ; grain 

 compressed, globose, pointed. "Paleae of the radical flowers crus- 

 taceous at maturity." Chapman's Floe a. Banks of the Apala- 

 chicola Elver, Florida. Sept, and Oct. 



25. (5). Eriochloa H. B. K. Nov. Gen. et Sp. 1 : 94 (1815). 



3Ionachne Beauv. Agrost, 49, t. 10 (1812), 



Helopus Trin, Fund, Agrost. 103 (1820). 



(Ediimcline Link, Hort. Berol. 1: 51 (1827). 



Aglycia Willd. ex Steud, Nom. Ed, 2, 1 : 37 (1840). 



Alycia Willd. ex Steud. 1. c. 66 (1840). 



Spikelets with 1 perfect flower, and in some cases with a second 

 staminate or neuter one, without protruding awns, with a callus, 

 annular or almost cuplike base, articulate on a short pedicel, in 1-2 

 rows, along one side of the simple branches of a simple panicle. 

 Empty glumes usually membranous, equal or subequal ; floral glume 

 of the terminal floret shorter, of a flrm corioaceous texture, obtuse, 

 but tipped with a tuft of hairs or a point or short awn, not exceed- 

 ing the outer glumes ; its palea of much the same texture. Stamens 

 3. Styles distinct, rather long. Grain enclosed, but not adherent, 



Bentham, in Flora Australiensis and in Genera Planta- 

 RUM, defines t?iis genus as 1-flowered. In accordance with a sugges- 

 tion by Vasey, in Botanical Gazette, p. 96, 1884, I have changed 

 the generic character to include Pamcum moUe Michx,, which 



