LAMIACEAE 1021 



tt Corolla less than 2 cm. long. 

 Corolla copiously pubescent. 



Leaf-blades glabrous above. 10. S. incana. 



Leaf-blafles pubescent above. 11. S. Altamaha. 



Corolla glabrous or nearly so. 12. S. pilosa. 



** Leaves, all or those above the middle of the stem, with entire blades.. 

 Upper lip of the corolla shorter than the throat. 



Leaf-blades and corollas glaV)rous or nearly so. 13. 8. glabriusculri. 



Leaf-blades and corollas variously pubescent. 

 Foliage manifestly pubescent." 



Upper lip of the corolla surpassing the lower. 14. ,"?. inteqrifoUa. 



Upper lip of the corolla surpassed by the lower. 1.5. S. muUiglandulofa 



Foliage merely puberulent. 16. S. hrevifoUa. 



Upper lip of the corolla longer than the throat. 17. S. Floridana. 



b. Flowers solitary in the axils of the leaf-like bracts. 

 Corolla less than 1.5 cm. long. 

 Plants annual or biennial. 



Foliage merely puberulent : leaf- blades coarsely toothed. 18. S. eardiopbyUa. 



Foliage manifestly pubescent : leaf-blades entire orshallowly toothed. 19. 5'. Drummondii. 

 Plants perennial. 



Perennial from a woody base and root. 



Foliage manifestly pubescent : nutlets over 1 mm. thick. 20. S. Helleri. 



Foliage merely puberulent : nutlets less than 1 mm. thick. 21. 8. resinosa. 



Perennial from slender or tuberous rootstocks : stems wholiy herba- 

 ceous. 

 Foliage glabrous or nearly so. 22. S. parvula. 



Foliage copiously pubescent. 23. S. campcstris. 



Corolla over 1.5 cm. long. 24. S. gnlericulata. 



B. Nutlets with membranous wings. 25. S. nervosa. 



1. Scutellaria lateriflora Ij. Perennial, glabrous, or puberulent above. Stems erect 

 or reclining, 2-10 dm. long, more or less widely branching : leaf-blades thinnish, ovate to 

 ovate-lanceolate, 2-6 era. long, acute, coarsely serrate, rounded or cordate at the base : 

 racemes axillary, 2-6 cm. long, slender : pedicels 1-4 mm. long : calyx 2-4 mm. long, the 

 crest at the middle of the upper lip : corolla blue, sometimes pale, 6-7 mm. long ; tulie 

 gradually enlarged, the lips about equal in size : nutlets about 1 mm. long, papillose. 



In swamps or along streams, Newfoundland to British Columbia, Florida, New Mexico and Wash- 

 ington. Summer and fall. 



2. Scutellaria Ocmulgee Small. Perennial, softly pubescent. Stems erect, 4-8 dm. 

 tall, more or less branched above, densely pubescent with short close-set hairs : leaf-blades 

 ovate to suborbicular, 3-8 cm. long, obtuse or aciitish, crenate, cordate, or the uppermost 

 trnncate : racemes panicled, 5-10 cm. long : bracts similar to the leaves but smaller : pedi- 

 cels stout, 1-3 mm. long: corolla bright blue, 2 cm. long; tube short, gradually dilated, 

 the lower lip broad, 6-7 mm. broad, entire, the upper lip with an entire middle lobe. 



On river banks, middle Georgia. Summer. 



3. Scutellaria cordifolia ]\luhl. Perennial, softly pubescent. Stems erect or ascend- 

 ing, 1-6 dm. tall, simple or branching : leaf-blades orbicnlar-ovate to oblong-ovate, 3-10 

 cm. long, obtuse or acutish, crenate or serrate- crenate, cordate : racemes or panicles many- 

 flowered : pedicel shorter than the calyx : bract shorter than the calyx or surpassing it : 

 calyx 4-5 mm. long, glandular-pilose, the crest about the middle : corolla bright blue, nearly 

 2 cm. long ; tube slender, dilated from below the middle, the upper lip with a notclied 

 middle lobe and lateral lobes broader than long, the lower lip with a conspicuonsly spotted 

 middle lobe : nutlets fully 1 mm. in diameter, tubereulate. 



On moist banks, Wisconsin to Pennsylvania, Florida and Texas. Spring and summer.— A form 

 with leaf-blades of firmer texture and larger bracts, is .S". cordifolia bractaUa (Benth.) Small. [S. versi- 

 color var. bracteata Benth.] Texas. 



4. Scutellaria arguta P>nokl. Perennial, pilose. Stems erect, 3-5 dm. tall, sim- 

 ple or nearly so : leaf-blades thin, ovate to oblong-ovate, 2-5 cm. long, acute or acutish, 

 paler beneath, deeply crenate-dentate or almost incised, cordate : racemes few-flowered : 

 pedicel becoming about as long as the calyx : bracts longer than the pedicels : calyx 3-3.5 

 mm. long, minutely glandular-pilose, the crest slightly below the middle : corolla blue, 

 15-18 cm. long ; tube gradually enlarged to the slightly dilated throat, the lower lip 

 barely retuse at the apex : nutlets 1.5 mm. long. 



On hillsides, North Carolina and Georgia. Spring and summer. 



5. Scutellaria saxatilis Kiddell. Perennial, glabrate or sparingly pubescent. Stems 

 simple and erect or diflusely branched and spreading, 1-3 dm. long : leaf-blades ovate or 

 suborbicular or ovate-lanceolate above, 1-4 cm. long, mostly obtuse, coarsely crenate or 

 serrate-crenate, truncate to cordate at the base : racemes few-flowered : pedicel becoming 

 as long as the calyx, or longer at maturity : calyx 2.5-3.5 mm. long, minutely glandular- 

 pilose, the crest slightly above the middle: corolla light blue, 12-16 mm. long ; tube grad- 



