Qr^2 NTCTAGrNEiE. (POUR-0-CLOCK FAMILY.) 



lobes oblong, obtusisli, alike ; corolla-lobes ovate, mucrouate, with a 

 buff-colored°throat — Spring — Sands ; Wadi-Zuweirali and southward 

 to Sinai and Egypt. 



21. P. areiiaria, W. K. © .3 to .5, pubescent ; stem erect or 

 diffuse,* stiff branched. Leaves linear to filiform, .03 to .06 long, .001 

 to .003 broad, entire, margin sorhewhat revolute, base often villulose. 

 Peduncles axillary, longer than leaves, more or less umbelled ; spikes 

 ovate .01 long, dense; bracts papillose-hirtulous at back, the lowest 

 ovate,^ tajjerlng into a herhaceous cusp longer tlian flowers, fhe iqjper spathu- 

 late-orlncuhw, menibranous-margined ; anterior calyx-lobes oUiqnely 

 ovate obtuse, posterior lanceolate, acutish, membranous; corolla-lobes 

 ovate-lanceolate, acute — Spring — Sands in valleys about the Dead 

 Sea, and southward to Egypt, 



Var. <livaricata, Boiss. Branches forked. Leaves shorter and 

 broader — A maritime form. 



22. P. sqiiarrosa, Murr. © .3 to .3, papillose-hairy, branch- 

 in"- from neck; stems diffused or ascending, usually branching. Leaves 

 somewhat fleshy, linear to linear-oUong, .02 to .04 long, .003 to .005 

 broad, often recurved. Peduncles axillary, as long as leaves or shorter; 

 3-5 together; spikes pubescent, oblong to cylindrical, .01 to .02 long; 

 tlie lower pair of h'acts f miming an involucre to the spilce, sometimes elon- 

 gated, ollong -lanceolate, recurved, somewhat narroiced above tlie dilated 

 base; the upper oblong, obtusish, as long' as calyx or longer ; anterior 

 calyx-lobes oblong-spathulate, somewhat oblique, posterior oblong, 

 keeled ; corolla-lobes ovate-oblong, acute — Spring — Sands along coast. 



Var. toracliystacliys, Boiss. Spikes globular or flattened- 



hemi spherical ; lower bracts shorter and thicker. 



DIVISION V. MONOCHLAMYDE£, D. C. APETALOUS PLANTS. 



Floral envelopes usually in one row, resembling either a 

 calyx or a corolla. Some genera or species of these orders 

 have both calyx and corolla. 



Order LXXXI. NYCTAOINE JE, Lindl. (Four-o-Clock Family.) 



Herls or shruhs, (ours) with op2)osite leaves, stems 

 tumid at the joints^ a camf>amdate, tulidar, or funnel-form 

 calyx resemlling a coroUa, its persistent tube constricted 

 ahove the 1-celled, 1-seeded ovary and nut-like fruit; the 

 stamens (in ours) 1-3, hypogijnous ; the emlryo (in ours) 

 condujylicate, enclosing the mealy allumen — Flowers (in ours) 

 hermaphrodite. Stamens inserted on a cup-like disk, usually 

 connate at base. OvarJ- free, short-stipitate ; style simple, 

 radicle inferior— Herbs with shrubby base. 



BCERHAAVIA, 1.. B(ERHAayia. 



Flowers destitute of involucre, hermaphrodite. Perigonium cam- 

 panulate or funnel-shaped, the limb 5-lobed, marcescent, usually decid- 

 uous with the upper part of tube. Anthers somewhat exserted, 2-celled. 



