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with elongated curved ascending tube dilated at throat (upper lip 
arched, entire or barely notched; the lateral lobes mostly connected 
with this rather than the lower; lower lobe or lip spreading and convex, 
notched at apex), 4 stamens ascending under the upper lip, and ciliate 
or bearded anthers approximate in pairs (those of the outer stamens 
1-celled, of the inner 2-celled and cordate). 
* Flowers in terminal single or panicled racemes, the floral leaves gradually reduced to 
bracts. 
+ Stems-leaves all cordate, crenate-toothed, slender-petioled: lateral lobes of corolla 
almost equaling short upper lip. 
1. S. versicolor Nutt. Soft-hairy, the hairs of the inflorescence, ete., partly vis- 
cid-glandular: stem mostly erect, 3 to 9 dm. high: leaves ovate or round-ovate, very 
veiny, rugose; the floral reduced to broadly ovate entire bracts about equaling the 
glandular-hairy calyx: racemes mostly simple: corolla bright blue with lower side 
and lip whitish.—Banks of streams, extending from the Atlantic region to western 
Texas. A Texan form is var. BRACTEATA Benth., which is more robust, with larger 
and firmer floral leaves, many of the lower occasionally longer than the flowers, 
which thus appear axillary rather than racemose. 
t t Stem-leaves crenate-dentate or serrate (or nearly entire in no. 3), only the lowest if 
any cordate at base, more or less petioled: lateral lobes of blue corolla shorter 
than the galeate upper lip. 
2. S. pilosa Michx. Pubescent with spreading hairs: stem nearly simple, 3 to 9 
dm. high: leaves rather distant, crenate, oblong-ovate, obtuse, varying to roundish- 
ovate; the lower abrupt or cordate at base and long-petioled; the upper on short 
margined petioles; bracts oblong-spatulate: racemes short, often branched: corolla 
12 mm. long, rather narrow, the lower lip a little the shorter.—Dry or sterile ground, 
extending from the Atlantic region into Texas. 
3. S.integrifolia L. Downy all over with a minute hoariness: stem commonly sim- 
ple, 3 to 6 dm. high: leaves oblong-lanceolate or linear, mostly entire, obtuse, very 
short-petioled: corolla 2.5 cm. long, much enlarged above, the ample lips equal in 
length.—Dry ground, extending from the Atlantic region into Texas. 
4. §. brevifolia Gray. Cinereous-puberulent throughout: stems numerous from a 
suffrutescent base, rigid, very leafy: leaves thickish, narrowly oblong, 12 to 16 mm. 
long by 4 to 6 mm. wide, all subsessile; floral similar, gradually smaller: corolla 18 
mm.long. (S. integrifolia, var. brevifolia Gray).—-Dry banks, Dallas. 
* * Flowers solitary in the axils of the upper mostly sessile leaves, which resemble the 
lower ones but are oceasionally reduced. 
+ Annual, loosely branched from base: corolla pubescent, 12 mm, or less long. 
5. S. cardiophylla Eng. & Gray. Puberulent, slender, with virgate branches: 
leaves cordate-ovate or deltoid-subcordate, mostly obtuse, veiny; principal cauline © 
ones coarsely crenate, slender-petioled; floral gradually smaller and less toothed, up- 
permost entire and subsessile, barely exceeding the calyx: corolla slender, blue.— 
Open woods, Arkansas and Texas. 
6. S. Drummondii Benth. Villous-pubescent, soon diffuse, leafy: leaves ovate 
or ovate-oblong, very obtuse, contracted at base, the lower into distinct petioles; 
| floral subsessile, about equaling the flowers; all entire or nearly so: corolla violet 
purple or blue, lower lip violet-spotted.—-Common throughout Texas in damp rich 
soil. 
++ Perennials, from a woody stock or producing filiform stolon-like rootstocks. 
7. S. Wrightii Gray. Firm and woody at base, not stoloniferous or tuberiferous, 
low, many-stemmed in a tuft, minutely cinereous-puberulent, very leafy: leaves 
