TRIANDRIA- DIGYNIA. 67 



Panicles lateral and terminal, spikelets often crowded, 

 flowers numerous; stipula obsolete, densely ciliate. 

 * Floxvers entirely deciduous. 



19. conferta, El. (panicles long- and very erect, axll- 

 liary and terminal; branches in conglomerate sessile clus- 

 ters, crowded with membranaceous flowers, spikelets 

 appearing pectinate or serrate.) 20. nitida, El. 

 , •* Inner •valve of the corolla and rachis persistent. 



21. parvijora, (branches of the panicle dichotomously 

 divaricate; flowers distant, terminal, approximating by 

 pairs upon unequal pedicells, inner valve of the corolla 

 and rachis persistent; seed nearly spherical, rugose. The 

 spikelets of this plant are somewhat glutinous. 'I'his is cer- 

 tainly not the P. striata of Lamark.) 22. tenella. (Gulm 

 slender, leaves short and subulate, panicle somewhat ver- 

 ticillate, erect, branches capillary, flexuose and appres- 

 sed, flowering towards their extremities. Spikelets few, 

 linear, somewhat acute, closely and incumbently imbri- 

 cated. Calix unequal and very short; flowers erect, ap- 

 pearing alternate, short ovate, with an oblique apex, 

 and almost obtuse, obscurely nerved, with a pi;rple 

 margin, and a whie scariose line at the point. Pos- 

 sessing considerably the appearance of a Briza.) 



23. pectinacea. 24. eragrostris. 25. megastachya, KoE- 

 LER. (^Briza Eragrostis, Lin.) 26. *obtusa.'\ '27-spectabilis. 



f Panicle elongated, almost simply branched at the base, 

 branches erect; spikelets compressed, oblong-ovate, obtuse, up- 

 on very short peduncles, 8 to 15-flowered; valves of ihe calix 

 acute, nearly the length of the 3-nerved flowers, inner valve with 

 1 nerve, the outer with 3; culm rather weak and compressed? 

 leaves flat and smooth, stipula obsolete, softly bearded. 



Obs. Culm simple, about 18 inches high; leaves few, rather 

 long, flat, and smooth, a little asperate on the margin; panicle 

 about 4 or 5 inches long, simply branched near the base, run- 

 ning out almost into a raceme above; fiosculi closely imbricated, 

 compressed; outer valve 3-nerved, truncate at the point; sta- 

 mina 3, short; styles slender, simply pcnnate. 



Briza virens? Walter. Flor. Car. 79. 



Closely allied to the B. Eragrostis, (Poa megaslachya.) but 

 readily distinguished by its unbranched, weak, and compressed 

 stem, the length of its leaves, which are not involute and rigid, 

 the scattered few-flowered panicle, and particularly the obtuse 

 points of tlie flower glumes, and lastly by the calix, in which 

 the larger valve is 3-nerved, and consequently similar to the 

 corolla, while the calix glumes of tlie Poa megastachya have 

 each but a single nerve, a character which not only distinguish 

 es it well from the present species, but also from the P. Era^ 



