TRIVKDIIIA DIG\MA» 465 



19. Ambigua. E. 



P. p uiicula spicata, pa- | Panicle spiked, expand- 



tente; spicis ovatis, eras- | ing; spikes ovate, thick, 

 sis,sessilibus,5— 6 floris; ) sessile, 5 — 6 flowered ; 

 valva exteriorc corollje ! the exterior valve of the 

 mucronata. E. j corolla mucronate. 



Perennial* Stem 2 feet high, terete, glabrous. Leaver linear, gla- 

 brous; sheaths shorter than the joints, bearded at the throat. Patu 

 ide small, expanding, pyramidal, witli tlie brarjches alternate. 

 Spikes somewhat distant, sessile, almost glabrous, dark purple. 

 Valves of tne calyx unequal, acute. Exterior valve of tliC corolla 

 ovate, pointed just beliind the summit with the projecting midrib, S 

 nerved, th« margins and midrib very hairy neat the base; interior 



?alve deeply impressed, not hairy. 



I have placed this plant liete, because it appears to me evidently 

 i convener with the preceding species. Both have the strong pro- 

 jecting midrib, the singular fringe, near the base of the corolla, and 

 tliick compact spike. They are probably both species of Koeleria. 



Found in the mountains of Carolina, by Dn Macbride, and in the 



lower country of Georgia, by Dr. Baldwin 



Flowers — September. Round -sjnked Poa. 



\ 



BRIZA. GEif. PL. 115. 



i 



Calyx S-valvis, multi- | Calyx 2 valved, many 



fioris. Spicula distich a," flowered. Spikes distich, 

 jalvulis cordatis, obUisis , j ous, with tlie valves cor- 

 interiore minuta. | date, obtuse ; tlie interior 



j valve minute. 

 1. Eragrostis. 



B. spiculis lanceolatis, | Spikes lanceolate, 20 



flosculis \iginti. Sp. pi. | flowered 

 l.p 



Mich. l.p. 72. Pursh, 1. p. 82. 



^oof annual. Stem decumbent, geniculate, dabrous, calumnar. 

 ^ws linear-lanceolate, smooth on the under surUce, scabrous on the 



U fh' *'i^ ^^''"^ ^^^ ^^=^* ' sheaths shorter than the joints, bearded 

 sfi uf ''^^*' Panicle decompound, erect. Spikes obloug-ovute, 

 cJ /r *^'"''^^e at base. Flowers 10—50. Exterior valve of the 

 ii7r ^^"^^' *^''®^ nerved ; the interior small ciliate along the 



>es ; tnc valves expand, when tiie seed ia mature. Jnthgrs white, 

 ^t^mas featliered. 



