GENUS 4. 



MINT FAMILY. 



105 



i. Trichostema dichotomum L. 



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, obtuse or sub- 

 acute at 'the apex, narrowed at the base into short 

 petioles, i'-3' long, 3"-io" wide, the upper grad- 

 ually smaller; flowers paniculate, 6' -9" long, 

 borne 1-3 together on 2-bracteolate 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, Vermont, Pennsyl- 

 vania, Missouri and Texas. The lateral flowers be- 

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



Blue Curls. Bastard Pennyroyal. Fig. 3573. 



2. Trichostema lineare Nutt. Narrow-leaved 

 Blue Curls. Fig. 3574. 



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, o'-Io 

 high, the branches ascending. Leaves linear, obtuse 

 or subacute, sessile or very short-petioled, \'-2 long, 

 i"-2" wide, sometimes with smaller ones or short 

 leafy branches in their axils ; flowers very similar to 

 those of the preceding species, sometimes larger. 



In sandy fields and dry pine barrens, Connecticut to 

 Georgia and Louisiana, mostly near the coast. July-Aug. 



5. SCUTELLARIA [Rivin.] L. Sp. PI. 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 15 others 

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

 flower. Type species : Scutellaria peregrlna L. 



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



Flowers 3"-s" long, in axillary and sometimes terminal secund racemes. i. S. lateri flora. 



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



Plant glabrous or very nearly so ; leaves broad. 2. 5". 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. 5". cordifolia. 



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



Leaves all except the lowest entire, narrow. 6. 5". integrifolia. 



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



Perennial from a thick woody root. 7. 5". resinosa. 



Fibrous-rooted ; perennial by rootstocks or stolons. 



Flowers 2"-$" long. 8. S. parvula. 



Flowers 8"-i3" long. 



