GRAMINE^. (grass FAMILY.) 863 



29. IIELEOCIILOA, Host. IlELKOcnLOA. 



Spikelets 1-flowered, short-pcdicclled, densely spiked along a 

 cylindrical axis. Glumes membranous, with a green, scabrous keel, 

 somewhat shorter than sessile floweret, nearly equal. Pales similar to 

 glumes, muticous, somewhat longer, the lower 1-ncrvcd, keeled, the 

 upper 2-nerved. Stamens 3. Styles 2, terminal, long; stigmas plu- 

 mose — Annuals, with aspect of Crypsis. 



1. H. scliCKiioidcs, L. .1 to .25; culms form- Fio. 385. 

 ing a hemispherical tuft. Upper leaves with ?n?/c7i diluted, 

 open sheaths. Spikes ovate-oblong to oblong-cylindri- 

 cal, .015 to .04 long, .000 to .OOOthick, with an involucre 

 of 1-2 of the upper leaves; glumes acute — Summer and 

 Autumn — Wet places; common. 



2. H. alopcciiroiclci^i, Schrad. .04 to .1; 

 culms usually simple, geniculate-ascending. Sheaths of up- 

 per leaves cylindrical, little dilated. Spikes oblong to 

 cylindrical, .01 to .03 long, .003 to .004 thick, oftc^n at 

 some distance from upper sheath ; glumes and lower pale 

 glabrous, except at ciliate-scabrous keel, rather obtuse, 

 somewhat unequal — Late summer and autumn — ^ ., 

 Ditcheis; subalpiue and alpine Lebanon to Akher Dagh."^ Lhcinofd'ei!''''' 



Var. acutig^lumis, Post. Glumes and lower pale tapering, acute 

 — Subalpine and alpine Lebanon. (//. acutiglumis, Boiss.) 



30. RIIIZOCEPHALrllS, Boiss. Rhizocepiialus. 



Spikelets 1-flowered, spiked. Glumes coriaceous, lanceolate, 3-nerv- 

 ed, connate at base into an urn, somewhat recurved Ym 386 

 above. Lower pale 5-nerved, coriaceous, closely con- 

 volute, enclosing the upper, hyaline, 2-nerved pale. 

 Filaments 2. Styles 0; stigmas 2, elongated, hairy. 

 Ovary ovate — Dwarf, nearly stemless herbs; spikes 

 overtopped by leaves, which form an involucre. 



R. Oriciitalis, Boiss. .05 to .08, nearly 

 glabrous, each plant forming a hemispherical tuft. 

 Sheath spathe-like, many-nerved, lamina linear, acu- 

 minate, scabridulous. Spikes terminal, solitary, ovute- 

 oblong, .01 to .015 long; spikelets short-pedicclled ; 

 glumes oblong-lanceolate, back glabrous at middle, 

 hirtellous at margins with club-shaped papilli; lower 

 pale somewhat longer than glumes, straight, involute, <,,ikcict of Kiiizorc 

 papillose-hirtellous — April — Between Qar3'etein and jdiaius orientaiis. 

 'Ain-el-Wu'ill (Palmyrene Desert). magnified a d.am. 



31. PIILEU]?!, L. Cat's-Tail Grass. Timothy. 



Spikelets perfect, 1-flowcrcd, often with a rudimentary pedicel at 

 the base of upper pale, croAvded into a spiked or capitate i)aniclc. 

 Glumes free, nearly equal, boat-shaped, acuminate or produced into iin 

 awn. Pales membranous, not aristatc, the lower tnmcatc, the upi)cr 

 2-keeled. Stamens 3. Styles 2, stigmas long, hairy — Annuals or 

 perennials with aspect of Alopecurus. 



