100 ASCLEPIADACE^. Schizonotus. 



8. SCHIZON6TUS, Gray. (.2jr>, I cleave, varog, the back, the hoods 

 of the crown open posteriorly as if split down the back ; in which it differs from 

 Acerates.) Single species. 



S. purpurascens, Gray. Herb a span to a foot high, canescently puberulent : leaves 

 opposite, cordate (an inch or more long), thickish: umbels 2, terminal, densely many- 

 flowered on peduncles longer than the pedicels : corolla reddish purple outside, flesh-color 

 within ; the oblong lobes a line and a half long ; the pale hoods about the same length : 

 anther-wings lunate. Proc. Am. Acad. xii. 60. Gomphocarpus purpurascens, Gray, Proc. 

 Am. Acad. x. 76, & Bot. Calif, i. 477 ( Schizonotus). California, on an open mountain sum- 

 mit in Lake Co., Greene (Mr. Towle) : fl. June. 



9. GOMPHOCARPUS, R. Br. (r6 [t yos, a peg or club, and XUQXOS, fruit.) 

 Old World and chiefly African genus, to which these two Californian species 

 are technically referred ; distinguished from Asclepias merely by the absence of 

 horn or crest to the hoods. Benth. & Hook. 1. c., excl. Acerates & Anantherix. 



G. cordiiblius, Benth. Glabrous : stem 2 or 3 feet high : leaves ovate or ovate-lan- 

 ceolate with cordate clasping base, aoute, opposite or rarely in threes, 2 to 5 inches long : 

 umbels 1 to 4, loosely many-flowered ; slender filiform pedicels equalling or shorter than 

 the peduncles : calyx villous-pubescent : corolla dark red-purple ; the lobes oval or oblong, 

 3 or 4 lines long: hoods erect on the summit of the short column, purplish, thin, ventricose, 

 with dorsally truncate summit produced at the ventral margins into subulate slender ascend- 

 ing cusp, equalling the anthers, a narrow fissure down the ventral side : follicles ovate- 

 lanceolate. smooth and glabrous, arrect on the deflexed fruiting pedicels. Gray, Bot. Calif. 

 i. 477. Acerates cordifolia, Benth. PI. Hartw. 323. A. atropnrpiirea, Kellogg, Proc. Calif. 

 Acad. i. 65. Asclepias " ecornutum," Kellogg, 1. c. 55. California, common in dry ground 

 through the great valley and foot-hills. 



G. tomentosus, Gray, 1. c. Tomentose up to the calyx or outside of the corolla with 

 soft floccose matted wool, resembling Asclepias vestita : stem 2 or 3 feet high, angled : leaves 

 opposite (rarely somewhat scattered), ovate or oblong, acute or acuminate (2 to 4 inches 

 long), mostly rounded at base, short-petioled : umbels terminal and lateral, sessile or nearly 

 so, loosely several-flowered : corolla greenish or dull purplish ; the lobes 4 lines long : hood 

 attached to the summit of the short distinct column, ventricose and rounded, spreading, 

 reaching to near the middle of the anthers, pointless, open, and as if 2-valved across the 

 top and to the middle of the back. Acerates tomentona, Torr. Bot. Mex. Bound. 160, t. 44. 

 Dry hills, California, from Monte Diablo to San Diego Co. 



Var. Xanti, Gray, 1. c., distinguished only by the hoods ; these somewhat oval, and 

 depending, so that the fissure becomes as if dorsal, and extends two-thirds down. Port 

 Tejon, Xantus. Ojai, Santa Barbara Co., Dr. 



10. ENSLENIA, Nutt. (Aloysius Enslen, an Austrian botanist, who col- 

 lected in the Atlantic U. S. early in the century.) - - Perennial twining herbs 

 (N. and S. American) ; with membranaceous and cordate opposite leaves, and 

 whitish flowers in small axillary pedunculate cymes. 



E. albida, Nutt. Tall-climbing, glabrous, with some slight pubescence : leaves some- 

 what hastately cordate, slender-petioled, acuminate-tipped : cymes 15-30-flowered : appen- 

 dages of the crown 2-awned : anther-tips erect, longer than the body of the anther : 

 ligulate awn-like appendages of the crown geminate. Gen. i. 164; Decaisne in DC. 

 I.e. 518; Deless. Ic. v. t. 63. River banks, S. Pennsylvania and Virginia to Illinois, Mis- 

 souri and Texas : fl. summer. 



11. Fi/OULiNIA, Decaisne. (Dr. Roulin, a French naturalist.) Twining 

 plants (Texas to Buenos Ayres), with the habit of Enslenia. DC. Prodr. viii. 

 516 ; Deless. Ic. v. t. 62. 



R. unifaria, Bngelm. Aspect and growth of Enslenia albida: leaves deeply cordate, 

 with rounded basal lobes of the larger ones incurved, abruptly slender-acuminate : cymes 



