bilobulatc lip. Bacopa acuminata (Walt.) Robins., Pagcsia acuminata (Walt.) 

 Penn. 



In ditches, bogs, wet depressions in fields and prairies, swamps and flat pine- 

 lands in Okla. (Pittsburg, McCurtain and Le Flore cos.) and in e. Tex., Aug.- 

 Oct.; from Del. and Md., s. to Fla., Tex., Okla. and Mo. 



4. Gratiola L. Hedge-hyssop 



Low mostly perennial or some biennial or annual herbs; leaves sessile; two 

 (rarely 1 ) bractlets usually at base of calyx; the 5 narrow divisions of calyx 

 more or less subequal; corolla tubular or narrowly campanulate, bilabiate; upper 

 lip of corolla entire or 2-cleft, the lower lip 3-cleft; style dilated or bilabiate at 

 apex: capsule 4-valved, many-seeded. 



About 20 species that are widely distributed. 



1. Plant villous-hirsute; anthers with contiguous vertical cells; flowers subsessile; 

 calyx lobes very unequal; corolla only slightly exceeding the calyx 

 1. G. pilosa. 



1. Plant glabrous or at most puberulent; anthers with a broad connective, the 



cells transverse; flowers mostly distinctly pedicellate; calyx lobes 

 equal or nearly so; corolla much-exceeding the calyx (2) 



2(1). Capsule 1-3 mm. long, much-exceeded by the calyx lobes; cauline leaves 

 clasping by a wide base, usually at least the upper with resinous 

 dots; rhizomes perennial, slender, stoloniferous 2. G. brevifolia. 



2. Capsule 3-6 mm. long, equal to or only slightly exceeded by the calyx lobes; 



cauline leaves narrowed to a sessile or scarcely clasping base, ob- 

 scurely glandular-punctate; roots annual, the main root thick and 

 producing many fibers (3) 



3(2). Corolla golden-yellow (especially the limb); capsule ovoid-pyramidal, nearly 

 twice as long as calyx lobes; stem less than 1 dm. high, thin, not 

 fleshy; in central and south Texas 3. G. flava. 



3. Corolla white (at least as to the limb); capsule globose to globose-ovoid, 



nearly or quite equaled by the calyx lobes; stems usually more than 

 1 dm. high, relatively thick and fleshy, mostly in east Texas (4) 



4(3). Pedicels slender, over 1 cm. long; hairs on upper side of corolla throat 

 clavate; capsule 4-5 mm. long, globose-ovoid, about equal to the 

 calyx lobes 4. G. neglecta. 



4. Pedicels stout, mostly much less than 1 cm. long; hairs on upper side of 



corolla throat filiform; capsule globose, usually slightly exceeding 

 the calyx lobes 5. G. virginiana. 



1. Gratiola pilosa Michx. Hairy hedge-hyssop. Fig. 687. 



Perennial, the firm tufted stems from a subligneous crown, villous-hirsute, 

 to 75 cm. high; leaves sessile by broad rounded clasping bases, to about 2 cm. 

 long, ovate to ovate-lanceolate, crenate-serrate; flowers subsessile or very short- 

 stalked in the axils; calyx segments very unequal; corolla white or purple-tinged, 

 5-9 mm. long, little-exceeding the calyx; anthers with contiguous vertical cells; 

 capsule 4-5 mm. long, slenderly conical. Sophronanthe pilosa (Michx.) Small, 

 Tragiola pilosa (Michx.) Small & Penn. 



In bogs, swamps and moist sandy woods, in wet meadows at head of lakes and 

 forming colonies in water, in Okla. (LeFlore Co.) and in e. third of Tex., June- 

 Aug.; from Fla. to Tex., n. to N.J., Md.. N.C., Ky., Ark. and Okla. 



2. Gratiola brevifolia Raf. Sticky hedge-hyssop. Fig. 687. 



Annual or short-lived perennial, puberulent and somewhat viscid, to about 

 35 cm. high; leaves lanceolate to linear-lanceolate, acute to acuminate, sparsely 



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