106 LOGAXIACE.E. Gonolobus. 



* * * Peduncles at the axils shorter than the leaf and umbellately 3-5-flowered : corolla 4 lines 

 long : crown cup-shaped, crenately lobed : stem twining or trailing, 2 to 4 feet long. 



G. productus, Torr. Minutely pubescent : leaves sagittate-cordate, or the broadest 

 with somewhat reniform base, and above gradually tapering-acuminate (an inch or two 

 long), the rounded and mostly incurved auricles much shorter than the slender petiole : 

 peduncles about the length of the petiole : corolla oblong-campanulate, as long as the 

 pedicel, dull greenish-purple, puberulent outside, nearly glabrous within, 5-cleft to rather 

 below the middle ; the lobes linear-oblong, somewhat erect : crown nearly equalling the 

 anthers and stigma, thinnish, inserted at base of the short column, and connected with it 

 by 5 membranaceous lamellae or crests (2-toothed at the upper edge, which only is free) 

 opposite the short lobes, the cavity of the crown thus as it were 5-celled : follicles ovate, 

 smooth. — Bot. Mex. Bound. 185. — W. Texas to Arizona. (Adjacent Mex.) 



# * * * Peduncles at the axils and terminal, filiform, surpassing the leaves, somewhat racemosely 

 several-flowered : corolla a line long : crown laciniate and double : stems not twining. 



G. parviilorus, Gray, 1. c. Hirsute-pubescent : stems much branched from the tuber- 

 ous base, a span or more high : leaves thinnish, ovate or the lower almost orbicular, not 

 cordate, often undulate, an inch or less long, short-petioled, the upper acute or acuminate : 

 slender peduncles 1 to 4 inches long : flowers short-pedicelled : corolla rotate, purplish, 

 glabrous, 5-parted ; the lobes ovate, becoming lanceolate : crown free from the column, 

 membranaceous, 5-parted; the lobes each deeply cleft into a pair of slender subulate pro- 

 cesses and before their base each augmented with a similar and rather longer free one, a 11 

 of them surpassing the stigma and more or less connivent over it : follicles large, ovate, 

 pubescent, tuberculate-muricate. — Lachnostoma ? parvijlorum, Torr. Bot. Mex. Bound. 165. 

 — S. W. Texas, Wright, Schott. 



Oeder LXXXIX. LOGANIACE^. 



Herbs, shrubs, or within the troi^ics trees, a few climbing, destitute of milky 

 juice ; distinguished by having, along with a free 2-celled ovary and axile pla- 

 centEB, opposite (occasionally verticillate) simjjle leaves, and stipules between their 

 bases, or a stipular line or narrow membrane in their place ; the flowers regular 

 and 4— 5-merous, with stamens on the tube or throat of the corolla alternate with 

 its lobes ; pollen of ordinary loose grains ; style one ; stigma terminal ; amphi- 

 tropous or anatropous seeds, and embryo rather small in copious albumen. There- 

 fore mainly like Rubiacea:, but with a superior ovary, while they also variously 

 approach ApocynacecB, Gentianacece, and even Scrophulariacece. The greater part 

 tropical. 



Tribe I. GELSEMIE^E. Stigmas 4, the apex of the style being twice 2-cleft. 



1. GELSEMIUM. Calyx 5-parted, imbricated. Corolla open-funnelform, 5-lobed; the 

 lobes broad and imbricated in the bud. Stamens 5, on the tube of corolla : anthers linear 

 or oblong and sagittate. Style filiform ; the 4 lobes stigmatose inside. Ovules numerous 

 in each cell, on linear placenta;. Capsule elliptical, compressed contrary to the narrow 

 partition, septicidal ; the conduplicate valves at lengtli 2-cleft at the apex. Seeds several 

 or numerous in each cell, winged. Embryo straight or slightly curved in fleshy albumen ; 

 the ovate flat cotyledons much shorter than the slender radicle. 



Tribe II. LOGANIE^E. Stigma single, entire or barely 2-lobed. Ovules numerous. 



* Corolla valvate in the bud, 5-lobed : capsule didymous or 2-lobed : herbs. 



2. SPIGELIA. Calyx 5-parted ; the lobes narrow, usually very slender. Corolla tubular- 

 funnelform or salverform, 15-nerved. Stamens 5 : anthers linear or oblong, 2-lobed at 

 base. Style filiform, articulated near or below the middle, the upper i)art often hollow, 

 above pul)erulent or pubescent. Ovules numerous in each cell, on a peltate stijiitate pla- 

 centa. Capsule didymous, somewhat compressed contrary to the partition, cireuniscissile 

 above the cupulo-like persistent base, and 2-coccous, the carpels soon loculicidally 2- 

 valved. Seeds few, peltate, angled by mutual pressure, closely packed on the placenta 

 into a globular mass. Embryo short and straight in fleshy or cartilaginous albumen. 



