LABI A TAE. 783 



blue or violet. In dry fields, Me. to Fla., Penn., Ky. and Tex. The lateral flow- 

 ers become inverted by torsion of the pedicels. July Oct. 



2. Trichostema lineare Nutt. NARROW-LEAVED BLUE CURLS. (I. F. f. 

 3074. ) Puberulent or glabrous, not viscid or scarcely so. Leaves linear, sessile 

 or short-petioled, 1-5 cm. long, sometimes with smaller ones or short leafy 

 branches in their axils; flowers similar to those of the preceding, sometimes larger. 

 In sandy fields and dry pine barrens, R. I. to Ga. and La. July-Aug. 



5. SCUTELLARIA L. 



Bitter herbs, some species shrubby. Flowers blue to violet, in bracted mostly 

 secund spike-like racemes, or solitary or 2-3 together in the axils. Calyx cam- 

 panulate, gibbous, 2-lipped, the lips entire, the upper one with a crest or protu- 

 berance upon its back and often deciduous in fruit. Corolla recurved-ascending, 

 dilated above into the throat, glabrous within, the limb 2-lipped; upper lip arched, 

 entire or emarginate; lower lip spreading or deflexed, its lateral lobes small and 

 somewhat connected with the upper, its middle lobe broad, the margins mostly 

 recurved. Stamens 4, didynamous, all anther-bearing, ascending under the upper 

 lip, the upper pair somewhat the shorter, their anthers 2-celled, ciliate; anthers of 

 the lower pair of stamens i-celled, also ciliate. Nutlets papillose or tuberculate. 

 [Latin, a dish, from the appendage to the fruiting calyx.] About 100 species of 

 wide distribution. Besides the following, some 1 1 others occur in southern and 

 western N. Am. 



* Nutlets wingless, very slightly elevated on the short gynobase. 

 Flowers 6-10 mm. long, in axillary and sometimes terminal racemes. 



i. S. latcriflora. 

 Flowers 12-30 mm. long, in terminal often panicled racemes. 



Plant glabrous or very nearly so ; leaves broad. 2. S. serrata. 



Plants pubescent, puberulent or pilose. 



Leaves, all except the floral, crenate or dentate, broad. 



Canescent, not glandular ; corolla canescent. 3. S. incana. 



Densely glandular-pubescent; corolla puberulent. 4. S. cordifoha. 



Pubescent below, glandular above; corolla nearly glabrous. 



5. S. pilosa. 



Leaves all except the lowest entire, narrow. 6. S. integrifolia. 



Flowers solitary in the axils or sometimes also in terminal bracted racemes. 



Annual, villous, branched from the base. 7. .S. Drummondii. 



Perennial from a thick woody root. 8. S. resinosa. 



Fibrous-rooted; perennial by rootstocks or stolons. 

 Flowers 4-8 mm. long. 



Plant glabrous, or slightly pubescent. 9. S. parvula. 



Plant densely pubescent all over. 10. S. campestris. 



Flowers 16-26 mm. long. 



Minutely and densely glandular-pubescent, resiniferous. 



ii. S. Brittonii. 



Densely cinereous-pubescent, pale. 12. S. Bus kit. 



Glabrous or merely slightly puberulent. 



Leaves ovate, slender-petioled, cordate, obtuse. 13. S. saxatilis. 

 Leaves lanceolate or ovate-lanceolate, nearly sessile, acute. 



14. S. galericulata. 

 * * Nutlets membranous-winged, elevated on the slender gynobase; flowers axillary. 



15. S. nervosa. 



1. Scutellaria lateriflora L. MAD-DOG SKULLCAP. (I. F. f. 3075.) Per- 

 ennial by slender stolons, glabrous, or puberulent above; stem slender, leafy, 

 2-6 dm. high. Leaves ovate, ovate-oblong or ovate-lanceolate, thin, slender- 

 petioled, acute or acuminate, coarsely dentate-serrate, obtuse, rounded or subcor- 

 date at the base, 2-8 cm. long, the upper gradually smaller, the uppermost some- 

 times entire; racemes narrow, secund; corolla blue, varying to nearly white, its 

 lips about equal, one-fifth as long as the tube. In wet places, Newf. to Ont., Br. 

 Col., Fla., N. Mex. and Wash. July-Sept. 



2. Scutellaria serrata Andr. SHOWY SKULLCAP. (I. F. f. 3076.) Peren- 

 nial; stem slender, 3-6 dm. high. Leaves ovate or elliptic, slender-petioled, 

 acute, crenate or dentate, 5-10 cm. long, the uppermost reduced to small bracts; 

 racemes almost always simple and terminal, the flowers opposite; corolla 2.5 cm. 



