524 ASCLEPIADE^. (MILKWEED FAMILY.) 



11. OIONURA. 21 Tall, erect herbs, shrubby at base; leaves cordate-ovate. 



t t •Anthers obtuse at tip, with short appendage or 0. 



12. LEPTADENIA, ^ Leafless shrubs, with aspect of Spartium junceum. 



t t t -Anthers obtuse at tip, not appendaged, incumbent over disk or immersed in it. 



13. BOUCEROSIA. 2^ Fleshy, leafless herbs, with tetragonal branches and aspect of 



Stapelia. 



1. PERIPL.OCA, L. Periploca. Maldh. 



Corolla rotate, with 5, spreading or reflexed lobes, alternating 

 with aristate scales. Filaments free; anthers bearded at back, adherent 

 at tip, apiculate beyond cells. Pollen-masses solitary, made up of 4, 

 coherent granules. Follicles terete, smooth — Shrubs, with brownish- 

 green or yellow flowers. 



* Tall shrubs, moi^e or less cUwhing hy Uoining of stems. 



1. P. Oraeca, L. 5 Leaves opposite, ovate to oblong-lanceo- 

 late, obtuse or acute, .05 to .1 long, glabrous, short-petioled. Cymes 

 terminal, loose; corolla .015 to .02 broad, bi'ownish-green, lobes oblong, 

 retuse, bearded at margin; scales of crown 2-auricled, ending in an 

 undivided awn ; follicles somewhat divergent — Spring — Galilee to 

 Leontes Valley, Phoenician plain, Lebanon, Marash, and northward and 

 eastward. 



Var. obloiigifolia, Post. Leaves oblong to oblong-lanceolate, 

 acuminate — Abeih (Lebanon). 



2. P. laevigata, Ait. 5 Branches short, rigid, the upper only 

 twining. Leaves opposite or clustered, nearly sessile, oblong to 

 elliptico-linear, obtuse or acute, much smaller than in the last, gla- 

 brous, nearly sessile. Cymes terminal, few-flowered, shorter than leaves; 

 corolla .005 to .008 broad, yelloio, glabrous^ execpi an ovate, woolly sjjot 

 near middle of obtuse or retuse lobes; scales of crown 2-auricled, 

 ending in a simple awn ; follicles horizontal — Spring — Lattakia. 



+ * Rigid, almost leafless shrubs, not twining or climbing. 



3. P. apliyUa, Dec. ^ 1 to 2 ; branches long, often pendulous, 

 naked, resembling those of Spartium junceum, velvety-canescent while 

 young, then glabrous. Leaves few, .002 to .003 long, ovate, canescent, 

 mucronulate, nearly sessile. Cymes in axils of abortive leaves, nearly 

 sessile, densely flowered; corolla brownish-purple, .008 to .01 broad, 

 lobes ovate, obtuse or retuse, concave, bearded along upper half of 

 margin; scales 2-auricled, ending in a simple awn; follicles velvety, 

 then glabrous, tapering, horizontal — Spring — Shittim plain. 



2. OL<OSSO]\EM4, Decaisne. Glossonema. 



Calyx 5-parted. Corolla subcampanulate, deeply 5-parted, lobes 

 fleshy above. Crown consisting of 5, flat leaves, adnate to base of co- 

 rolla, tapering at tip into filaments ; pollen-masses ovate, pendulous 

 from ascending funicles. Follicles unarmed or spiny — Perennial herbs. 



Cr. BoTcanum, Dec. If .3, more or less canescent, branching 

 from base, more or less prostrate. Leaves short-petioled, truncate or 

 cuneate at base, ovate-oblong to lanceolate or linear, .01 to .03 long. 



