GEAMINE^. (GRASS FAMILY.) 



863 



29. HEL<X:0€HL.OA, Host. . Heleochloa. 



Spikelets 1 -flowered, short -pedicelled, 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-nerved, keeled, the 

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

 mose — Annuals, with aspect of Crypsis. 



1. H. §cliGBnoitles, L. .1 to .25; culms form- Fig. 385. 

 ing a hemispherical tuft. Upper leaves with much dilated, 

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

 cal, .015 to .04 long, .000 to .009 thick, with an involucre 

 of 1-3 of the upper leaves; glumes acute — Summer and 

 Autumn — Wet places ; common. 



2. H. alopecuroictc§, Schrad. .04 to .1; 

 culms usually simple, geniculate-ascending . SheatJis of uj)- 

 Xjer leaves cylindrical^ little dilated. Spikes oblong to 

 cylindrical, .01 to .03 long, .003 to .004 thick, often at 

 some distance from upper sheath ; glumes and lower pale 

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

 somewhat unequal — Late summer and autumn — snikeofiieieociiioa 

 Ditches; subalpine and alpine Lebanon to Akher Dagh.' sciKEnoides. 



Var. acutigliiinis, Post. Glumes and lower pale tapering, acute 

 — Subalpine and alpine Lebanon. {H. acutiglumis, Boiss.) 



30. RII1ZOCEPIIAL.US, Boiss. Rhizocephalus. 



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

 ed, connate at base into an urn, somewhat recurved -p^^^ ggg 

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

 volute, enclosing the upper, hyaline, 3-nerved pale. 

 Filaments 3. Styles 0; stigmas 3, elongated, hairy. 

 Ovary ovate — Dwarf, nearly stemless herbs ; spikes 

 overtopped by leaves, which form an involucre. 



R, Orietitalis, Boiss. 



glabrous, each plant forming .. ^- 



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

 minate, scabridulous. Spikes terminal, solitary, ovate- 

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

 glumes oblong-lanceolate, back glabrous at middle, 

 hirtellous at margins with club-shaped papilli ; lower 

 pale somewhat longer than glumes, straight, involute, gpiteiet of Khizoce- 

 papillose-hirtellous — April — Between Qaryetein and phaius Orientaiis. 

 'Ain-el-Wu'ul (Palmyrene Desert). magnified 4 diam. 



31. PHL.EUM, L. Cat's-Tail Ghass. Timothy. 



Spikelets perfect, 1-flowered, often with a . rudimentary pedicel at 

 the base of upper pale, crowded into a spiked or capitate panicle. 

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

 awn. Pales membranous, not aristate, the lower truncate, the upper 

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

 perennials with aspect of Alopecurus. 



.05 to .08, nearly 

 a hemispherical tuft. 



