Gonolobus. ASCLEPIADACE^E. 105 



* Peduncles none, or merely a terminal one by the reduction of uppermost leaves to bracts : pedicels 

 2 or 3 in a fascicle, as long as the flower : stems a foot or two long, procumbent or diffuse, not 

 twining. 



G. pubiflorus, Engelm. Soft-pubescent and somewhat hirsute: leaves (about an inch 

 long) broadly cordate or reniform, on petioles hardly longer than the basal lobes, the upper 

 acute or sometimes acuminate : pedicels rather shorter than the flower : corolla campanu- 

 late, 5-cleft barely to the middle (3 lines long) ; its lobes oblong-ovate, very villous inside : 

 crown globular cup-shaped, higher than the anthers and acutely 5-angled stigma, thinnish, 

 obscurely 5-lobcd at the involute somewhat plaited summit ; the lobes undulate-truncate and 

 with a prominent callous tip, obscurely glandular within, and the tube within traversed with 

 5 light salient (or almost obsolete) ribs or crests ; also 5 small adnate auricles at very base 

 within: follicles "oval, smooth." PI. Lindh. i. 44; Torr. Bot. Mex. Bound. 165. G. pros- 

 tratits, Balclw. in Ell. Sk. i. 329, not R. Br. Chlhamalia pubiflora, Decaisne in DC. 1. c. 605. 

 Georgia, on sandhills of the Altamaha lliver, &c., Lyoii, Baldwin, LeConte : rare. 



G. biflorus, Nutt. Hirsute-villous : leaves cordate (an inch or so in length), on slender 

 petioles much longer than basal lobes, the upper triangular-cordate, uppermost occasionally 

 reduced and bract-like : pedicels in pairs or sometimes solitary, nearly equalling the petiole : 

 corolla rotate, deeply 5-cleft, dark dull-purple (24- lines long) ; the lobes oblong, sparsely 

 pubescent both sides : crown saucer-shaped, 5-lobed, and the sinuses occasionally 2-3-den- 

 ticulate ; the lobes traversed within by a salient canaliculate crest, which at base is adnate 

 to the base of the column and at summit extends into a conspicuous callous acumination 

 which incurves over the edge of the stigma : follicles muricate. Torr. 1. c. 165. CMiamalia 

 liflora, Decaisne, 1. c. Arkansas (Nutt all, &c.) and Texas. 



Var. "Wrightii, a form with corolla almost 5-parted into oblong-linear lobes : the 

 callous acumination of the crown shorter, and the large and stout follicles hirsute as well 

 as muricate. E. Texas, Wriijht. 



G. cynanch.oid.es, Engelm. Pubescent and somewhat hirsute : leaves cordate (an 

 inch or two long) on short petioles mostly longer than the basal lobes, the upper often 

 ovate-lanceolate and subcordate, uppermost not rarely reduced to bracts ; the inflorescence 

 thus becoming somewhat racemose-clustered at naked summit : pedicels also in pairs from 

 a few of the axils below, rather longer than the petiole : corolla rotate-carapanulate, dark 

 greenish-purple (2 lines long), almost 5-parted ; its lobes ovate or oblong, somewhat pubes- 

 cent outside, glabrous within : crown saucer-shaped, thick, 5-lobed ; the lobes broad and 

 rounded, with a callous obscurely 3-crenulate margin, appendaged inside by a prominent 

 crest or ligule ; which is free and obtuse at apex, channelled below, and at base decurrent 

 on the column: anther-tips (as in preceding) partly inflexed over the stigma: follicles 

 ovate, sparsely short-muricate, pubescent. PI. Lindh. i. 43; Torr. I.e. Dry prairies, 

 Arkansas and Texas, Berlandicr, Drummond, Lindkeimer, &c. 



* * Peduncles none: flowers solitary (or rarely geminate) and nearly sessile in the axils of the 

 very small and somewhat hastate leaves : stems low but twining. 



G. parvifolius, Torr. Puberulent, much branched, sparingly climbing : leaves thickish, 

 deltoid or hastate, 2 to 5 lines long, and rather long-petioled : corolla globose in the bud, 

 barely a line and a half long, dull yellow, glabrous throughout, nearly rotate, deeply 5-lobed ; 

 the lobes ovate, obtuse : crown at the base of the very short column, fleshy, deeply 5-lobed ; 

 the lobes broadly ovate, obtuse or emarginate, spreading, almost equalling the undivided 

 portion of the corolla, concave, appendaged by a broad and wholly adnate thin crest which 

 is connected with the base of the very short column, and at tip within is extended into 

 a minute projecting tooth. Bot. Mex. Bound. 166 (excl. fruit) ; Gray, Proc. Am. Acad. 

 xii. 78. S. W. Texas, in a canon of the Rio Grande below Mount Carmel, Parry. Fruit 

 unknown, that described belonging to G. sayittifolins. 



G. hastulatus, Gray, 1- c. Canescently pubescent : filiform stems freely twining : 

 leaves mostly hastate, 2 or 3 lines long, slender-petioled : corolla narrowly oblong in the 

 bud, 2 lines long, whitish, glabrous, 5-parted ; the lobes ligulate-linear : crown borne on the 

 summit of the distinct column close to the anthers, of 5 white and thinnish Asclepias-like 

 hoods, which are complicate-concave, acutely 3-toothed at summit, its internal crest free 

 at the apex, falcate, and extended into a subulate process which is inflexed over the stigma : 

 follicles fusiform, sparsely muricate. Lachnostoma kastulatum, Gray, Bot. Calif, i. 620. 

 Tantillas Canon, below the southern boundary line of California, Palmer. 



