270 
*** Corolla not conspicuously reticulated: crown appendaged or crested within, or else 
double (the internal appendages free): stems low, little or not at all twining. 
+ Peduncles none (or merely a terminal one by reduction of uppermost leaves to bracts). 
4. G. biflorus Nutt. Hirsute-villous: procumbent or diffuse, not twining: leaves 
cordate, about 2.5 em. long, on slender petioles much longer than the basal lobes; the 
upper triangular-cordate; uppermost sometimes reduced and bract-like: pedicels in 
pairs, sometimes solitary, nearly equaling the petiole: corolla dark dull-purple; lobes 
sparsely pubescent both sides: crown saucer-shaped, 5-lobed; the lobes with a salient 
crest within which at summit extends into a conspicuous callous acumination in- 
curving over the edge of the stigma: pods muricate.—Extending from Arkansas into 
western Texas. In eastern Texas is var. WRIGHTI Gray, with more deeply parted 
corolla, shorter acumination of crown, and large stout pods hirsute as well as muri- 
cate, 
5. G. cynanchoides Engelm. Pubescent and somewhat hirsute: procumbent or 
diffuse, not twining: leaves cordate, 2.5 to5 cm. long, on short petioles mostly longer 
than the basal lobes; upper often ovate-lanceolate; uppermost not rarely reduced to 
bracts, the inflorescence thus becoming clustered at naked summit: pedicels also in 
pairs from a few axils below, rather longer than petiole: corolla dark greenish-pur- 
ple; lobes pubescent outside, glabrous within: crown saucer-shaped, 5-lobed; lobes 
appendaged inside by a prominent crest or ligule which is free and obtuse at apex: 
pods sparsely muricate, pubescent.—Dry prairies, extending from Arkansas to west- 
ern Texas. 
6. G. parvifolius Torr. Puberulent, much branched, sparingly climbing: leaves 
thickish, deltoid or hastate, very small, 4 to 10 mm. long and rather long-petioled: 
flowers solitary (rarely 2) and nearly sessile in the axils: corolla small, dull yellow, 
glabrous throughout: crown fleshy, deeply 5-lobed; lobes appendaged by a broad 
and wholly adnate crest which at tip within is extended into a minute projecting 
tooth.—Southern and western Texas. 
++ Peduneles axillary and terminal, umbellately or racemosely flowered. 
7. G. productus Torr. Minutely pubescent: stem twining or trailing, 6 to 12 dm. 
long: leaves sagittate-cordate, gradually tapering-acuminate above, with slender 
petiole: peduncles axillary, about as long as petioles and umbellately 3 to 5-flowered: 
corolla 8 mm. long, oblong-campanulate, dull greenish-purple: crown cup-shaped, 
crenately lobed: pods smooth.—Western Texas. 
8. G. parviflorus Gray. Hirsute-pubescent: stems not twining, low, much, 
branched from a tuberous base: leaves ovate (orlower almost orbicular), not cordate, 
often undulate, short-petioled: peduncles axillary and terminal, filiform, surpassing 
the leaves, somewhat racemosely flowered: corolla 2 mm. long, rotate, purplish: 
crown laciniate and double: pods pubescent, tuberculate-muricate. (Lachnostoma ? 
parviflorum Torr. Mex. Bound.)—Southern and western Texas. 
LOGANIACEH. (LOGANIA FAMILY.) 
Herbs, shrubs or trees, with opposite (mostly) entire leaves and 
stipules or a stipular line or membrane between them, regular 4 or 5- 
merous 4 or 5-androus perfect flowers, and ovary free from calyx. 
* Stigmas 4, apex of style being twice 2-cleft: woody twiners with evergreen leaves. 
1. Gelsemium. Corolla large, the 5 lobes imbricated in bud: style slender. 
* * Stigma single, entire or barely 2-lobed, 
+ Corolla valvate in bud, 5-lobed: pod didymous or 2-lobed: herbs. 
2. Spigelia. Style single, jointed in the middle: corolla tubular funnelform or 
salverform, 
