1024 LAMIACEAE 



lower lip 5 mm. broad, 4-lobed, notched, the upper lip much smaller than lower, the lateral 

 lobes about as long as middle one : anthers barely ciliate : nutlets 1 mm. broad, granular. 

 On prairies. Kansas to Texas. Spring. 



20. Scutellaria Helleri Small. Perennial, villous-hirsute. Stem usually branched at 

 the base, the branches 0.5-3 dm. tall, commonly branched above : leaf-blades ovate, some- 

 times narrowly so, 1-2 cm. long, shallowly toothed or undulate, those of the lower leaves 

 petioled : pedicel shorter than the calyx : calyx becoming 4-5 mm. long, finely hirsute : 

 corolla minutely pubescent, about 1 cm. long : nutlets over 1 mm. thick. 



On rocky or calcareous prairies, Texas and adjacent Mexico., Spring. 



21. Scutellaria resinosa Torr. Perennial, more or less cinereous-puberulent and 

 resinous-dotted. Stems diffusely branched at the base, the branches erect or spreading, 1-3 

 dm. long : leaf -blades ovate oval elliptic to oblong-spatulate, 1-1.5 cm. long, obtuse, entire, 

 gradually or abruptly narrowed at the base, the lower ones short-petioled, the upper sessile 

 or nearly so : pedicel as long as the calyx or shorter : calyx 3-5 mm. long, merely resinous, 

 the crest near the apex of upper lip : corolla blue or purplish, minutely pilose, 1 cm. long, 

 the upper lip with lateral lobes as long as the middle one, the lower lip with a yellow or a 

 white blotch in the center, the terminal one notched : anthers glabrous or nearly go : nut- 

 lets less than 1 mm. broad, granular. 



On prairies or hillsides, Kansas to Texas. Spring. 



22. Scutellaria parvula Michx. Perennial, glabrate or minutely pubescent, the 

 rootstocks producing chains of small tubers. Stems erect, simple or diffusely branched, 

 0.5-3 dm. tall : leaf-blades broadly ovate to lanceolate, 1-2 cm. long, obtuse or acutish, or 

 often prominently nerved beneath, commonly revolute, truncate or subcordate at the base, 

 closely sessile : pedicel as long as the calyx, or shorter : calyx puberulent, 2-4 mm. long, 

 the crest near the middle of the upper lip : corolla blue, 4-8 mm. long, minutely pilose, 

 the lower lip suborbicular, about 3 mm. broad, emarginate, the upper lip shorter than the 

 lower, 3-lobed : nutlets about 1 mm. in diameter, papillose. 



In dry sandy or clay soil, Quebec to Minnesota, Florida and Texas. Spring and summer. 



23. Scutellaria campestris Britton. Perennial, densely soft-pubescent and some- 

 what viscid. Stems simple and erect or diffusely branched, the branches ascending or 

 spreading, 0.5-2 cm. long: leaf -blades ovate, suborbicular or reniform at the base of the 

 stem or ovate-lanceolate at the top, obtuse, entire or shallowly toothed, prominently nerved 

 beneath, the lower ones short-petioled, the upper sessile : pedicel as long as the calyx, or 

 shorter : calyx 2-4 mm. long, minutely glandular-pilose, the crest about the middle : 

 corolla blue, 6-7 mm. long, the lower lip 4-lobed, the upper lip 3-lobed, the lobes nearly 

 equal : anthers nearly glabrous : nutlets 1 mm. in diameter, tuberculate. 



In sandy soil, North Carolina to Iowa and the Indian Territory. Spring and early summer. 



24. Scutellaria galericulata L. Perennial, glabrate or finely pubescent. Stems 

 erect or reclining, 2-9 dm. long, simple or much branched : leaf-blades membranous, ob- 

 long or oblong-lanceolate, acute, shallowly serrate, truncate or cordate at the base, the 

 lower ones short-petioled, the upper sessile : pedicel shorter than calyx : calyx 3.5-5 mm. 

 long, minutely pubescent, the crest below the middle : corolla blue or white, 15-18 mm. 

 long, the lower lip broadly reniform, undulate, the upper lip shorter than the lower, 3- 

 lobed, the middle lobe notched : anthers short-ciliate : nutlets fully 2 mm. long, tuberculate. 



In low grounds or swamps, Newfoundland to Alaska, New Jersey, North Carolina, Nebraska, Ari- 

 zona and Washington. Also in Europe and Asia. Summer and fall. 



25. Scutellaria nervosa Pursh. Perennial, minutely pubescent. Stems erect, 1-4 

 dm. tall, simple or sparingly branched : leaf-blades suborbicular to oval or lanceolate above, 

 undulate or coarsely serrate, rounded or cordate at the base, the lower ones short-petioled, 

 the upper sessile : flowers axillary to bracts somewhat narrower than the leaves : pedicels 

 2-4 mm. long : calyx becoming 5 or 6 mm. long : corolla blue or purplish, 8-10 mm. long, 

 minutely pubescent : nutlets raised on a slender gynobase, each with a membranous wing. 



In woods and thickets, New York to Missouri, and North Carolina. Spring and summer. 



6. MARRUBIUM L. 



Perennial caulescent herbs, with woolly foliage. Leaves opposite : blades toothed, 

 often rugose. Flowers in dense axillary clusters. Calyx tubular : tube 5-10- ribbed": lobes 

 10, equal or alternately long and short, slender, spreading or recurved at maturity. 

 Corolla white or purplish, 2-lipped : upper lip erect, entire or notched : lower lip spread- 

 ing with 2 small lateral lobes and a broad middle lobe. Stamens 4, included : filaments 

 slender, anterior pair longer : anthers 2-celled : sacs divergent. Nutlets smooth or granular. 



