1020 LAMIACEAE 



Flowers in axillary cymes, or often disposed in panicles. Calyx campanulate : tube short : 

 lobes 5, unequal. Corolla white, pink, blue or purple, slightly irregular : lobes somewhat 

 declined. Stamens 4, conspicuously exerted : filaments curved, the anterior pair longer, 

 all spirally coiled in the bud : anthers with divergent sacs. Nutlets reticulated. 



Annual plants : leaf-blades of a linear or oblong type. 



Foliage glabrous or viscid-puberulent : leaf-blades linear. 1. T. lineare. 



Foliage viscid-pubescent : leaf-blades oblong or oblong-lanceolate. 2. T. dichotomum. 



Perennial or biennial plant : leaf-blades of an obovate or cuneate type. 3. T. suffrutescens. 



1. Trichostema lineare Nutt. Annual, somewhat viscid-puberulent or glabrous. 

 Stems 1-3 dm. tall, branching : leaf-blades linear, 1-4 cm. long, acute at both ends, entire, 

 sessile or short-petioled : calyx 3 mm. long, becoming 5 mm. long ; tube turbinate or in- 

 flated in age ; larger lip with 3 acuminate lobes ; smaller lip with 2 much smaller ovate- 

 lanceolate lobes : corolla blue or rarely white, about 1 cm. long, the middle lobe of the 

 lower lip cuneate : nutlets 1.5 mm. long. 



In sandy soil and pine lands, Connecticut to Florida and Louisiana. Summer. 



2. Trichostema dichotomum L. Annual, minutely viscid-pubescent. Stems com- 

 monly much-branched, 1-20 dm. tall : leaf-blades thickish, oblong to oblong-lanceolate, 2-7 

 cm. long, obtuse or abruptly pointed, entire, acuminate at the base, short-petioled : pedicels 

 3-8 mm. long, spreading or somewhat recurved at maturity : calyx 4 mm. long, becoming 

 8 mm. long ; tube turbinate or inflated in age, the large lip sharply 3-lobed : corolla blue, 

 pink or white, less than 1 cm. long : nutlets 2 mm. long. 



In sandy soil and thickets, Maine to Florida, Kentucky and Texas. Summer and fall. 



3. Trichostema suffnit6scens Kearney. Biennial or perennial, puberulent. Stems 

 branched throughout, 2-4 dm. tall, the branches erect or ascending : leaves often clus- 

 tered in axils ; blades obovate, oblong-oboyate, more or le^s cuneate at the base, 0.5-1 

 cm. long, thickish, rounded or retuse at apex, ciliolate, short-petioled : pedicel about as 

 long at the calyx : calyx 3 mm., becoming 5-6 mm. long ; tube turbinate or inflated in age, 

 the larger lip sharply 3-toothed : corolla bright blue : filaments 2-2.5 cm. long, closely 

 coiled : nutlets obovoid, 1.5 mm. long. 



In scrub, peninsular Florida. Spring. 



5. SCUTELLARIA L. 



Annual or perennial, sometimes shrubby herbs, with glandular-punctate and bitter 

 foliage. Leaves opposite : blades various, entire or toothed. Flowers in terminal racemes 

 or panicles. Calyx campanulate, 2-lipped : lips entire, the upper one with a crest or pro- 

 tuberance. Corolla white, blue or violet, erect or ascending by the recurved tube, this 

 dilated into a throat, 2-lipped, the upper lip arched, the lower lip with 2 small lateral 

 lobes and a large, more or less spreading, middle lobe. Stamens 4 : filaments all anther- 

 bearing : anthers ciliate, those of the upper pair of filaments 2-celled, those of the lower 

 1-celled. Nutlets papillose or tuberculate, wingless or rarely winged. 



A. Nutlets wingless. 



a. Flowers in terminal or axillary racemes or panicles. 



Corolla less than 1 cm. long. 1. S. laterifiora. 



Corolla over 1 cm. long. 



Leaf-blades above the middle'of the stem cordate. 



Foliage, especially the internodes, of the stem and inflorescence, 



copiously pubescent. 

 Corolla over 15 mm. long. 



Larger leaves with petioles less than % as long as the blades : 



inflorescence pubescent with very short close-set hairs. 2. S. Ocmulgee. 



Larger leaves with petioles over ^ as long as the blades : in- 

 florescence pubescent with villous hairs. 3. S. cordifolia. 

 Corolla less than 15 mm. long. 4. S. arguta. 

 Foliage glabrous or with scattered hairs at the nodes of the stem 



and in the inflorescence. 5. /S. saxatilis. 



Leaf-blades above the middle of the stein abruptly or gradually nar- 

 rowed at the base. 

 * Leaves all with toothed blades. 

 t t Corolla over 2 cm. long. 



Foliage glabrous or nearly so. 6. S. serrata. 



Foliage, especially the stem, finely and closely pubescent. 

 Corolla between 2.5 and 3 cm. long. 



Leaf-blades acute, not prominently nerved beneath : Alle- 



ghenianspecies. 7. S. montana . 



Leaf-blades obtuse, prominently nerved beneath : Flo- 



ridian species. 8. 5. arenicola. 



Corolla between 2 and 2.5 cm. long. 9. S. Hellichampii. 



