78 



LABIATAE. 



[Vol. III. 



i. Trichostema dichotomumL. Blue Curls. Bastard Pennyroyal. (Fig. 3073.) 



Trichostema dichotomum L. Sp. PI. 598. 1753. 



Annual, minutely viscid-pubescent; stem slen- 

 der, rather stiff, much branched, 6 / -2 high, 

 the branches spreading or ascending. Leaves 

 oblong or oblong-lanceolate, membranous, ob- 

 tuse or subacute at the apex, narrowed at the 

 base into short petioles, i / ~3 / long, 3 // -io // wide, 

 the upper gradually smaller; flowers paniculate, 

 6 // -c/ / long, borne 1-3 together on 2-bracteo- 

 late peduncles; calyx oblique, very unequally 5- 

 lobed, the 3 upper lobes much longer and more 

 united than the 2 lower ones; corolla blue, pink 

 or rarely nearly white, the limb longer than the 

 tube; stamens blue or violet. 



In dry fields, Maine to Florida, west to Pennsyl- 

 vania, Kentucky and Texas. The lateral flowers be- 

 come inverted by torsion of the pedicels. July-Oct. 



2. Trichostema lineare Nutt. Narrow- 

 leaved Blue Curls. (Fig. 3074.) 



T. brachiatum Lam. Encycl. 8: 84. 1808. Not L. 1753. 

 Trichostema lineare Nutt. Gen. 2: 39. 1818. 



Puberulent or glabrous, not viscid or scarcely so; 

 stem very slender, at length widely branched, 6'- 

 i8 / high, the branches ascending. Leaves linear, 

 obtuse or subacute, sessile or very short-petioled, 

 Yz'-i' long, i // -2 // wide, sometimes with smaller 

 ones or short leafy branches in their axil-; flowers 

 very similar to those of the preceding species, 

 sometimes larger. 



In sandy fields and dry pine barrens, Connecticut and 

 Long Island to Georgia and Louisiana, mostly near the 

 coast. Slightly, but apparently constantly different 

 from the preceding. July-Aug. 



5. SCUTELLARIA L. Sp. 



598 



1753- 



Annual or perennial bitter herbs, some species shrubby. Flowers blue to violet, in 

 terminal or axillary bracted mostly secund spike-like racemes, or solitary or 2-3 together in 

 the axils. Calyx campanulate, gibbous, 2-lipped, the lips entire, the upper one with a crest or 

 protuberance upon its back and often deciduous in fruit, the lower one persistent. Corolla 

 much exserted, 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, sometimes emar- 

 ginate, 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. Style unequally 2-cleft at the 

 apex; ovary deeply 4-parted. Nutlets subglobose or depressed, papillose or tuberculate, borne 

 on a short or elongated gynobase. [Latin, a dish, from the appendage to the fruiting calyx.] 

 About 100 species of wide geographic distribution. Besides the following, some 11 others oc- 

 cur in the southern and western parts of North America, all known as Skullcap, or Helmet-flower. 



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



Flowers 3" -5" long, in axillary and sometimes terminal racemes. I. 

 Flowers 6"-i5" long, in terminal often panicled racemes. 



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

 Plants pubescent, puberulent or pilose. 



Leaves all except the floral crenate or dentate, broad. 



Canescent, not glandular; corolla canescent. 3. 



Densely glandular-pubescent; corolla puberulent. 4. 



Pubescent below, glandular above; corolla nearly glabrous. 5. 



Leaves all except the lowest entire, narrow. 6. 



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



Annual, villous, branched from the base. 7- 



Perennial from a thick woody root. 8, 



5. lateriflora. 

 S. serrata. 



S. incana. 

 S. cordi/olia. 

 S. pilosa. 

 S. integrifolia. 



S. Drummondii. 

 S. resinosa. 



