218 American Midland Naturalist Monograph No. 2 



26. Calyx 2-lipped. 



29. Fertile stamens 2; corolla purplish 16. Salvia 



29. Fertile stamens 4; corolla white 20. Melissa 



24. Leaves entire; calyx 2-lipped; corolla purple, 8-10 mm. long, 

 puberulent; stamens 4 22. Clinopodium 



1. Teucrium L. 



1 . Calyx and upper part of stem canescent-puberulent with short, somewhat 

 curved, glandless hairs; corolla 1.5 cm. long; moist ground, common. 

 June- Aug _T. canadense L. 



1. Calyx and upper part of stem short-villous with straight, often somewhat 

 glandular hairs; corolla 1 cm. long; moist ground, locally in the n. two- 

 thirds of the state. July-Sept. [T. boreale Bickn.] T. occidentale Gray 



2. Isanthus Michx. 



/. hrachiatus (L.) BSP. False Pennyroyal. Gravelly or sandy soil along 

 roads or in fields or open woods, local. Aug. -Sept. 



3. Trichostema L. 



T. dichotoma L. Bluecurls. Sandy soil in open woods, rare. Ottawa, La 

 Salle Co., Seymour in 1882; "S. 111.," without definite locality, Vasey. Aug.- 

 Sept. 



4. Scutellaria L. — Skullcap 



1. Flowers in axillary or terminal racemes. 



2. Flowers 6-7 mm. long; plants glabrous throughout or puberulent above; 



moist ground, common. July-Sept S. lateriflora L. 



2. Flowers 12-25 mm. long. 



3. Stem-leaves cordate; stem puberulent or short-pilose; corolla puberu- 

 lent, 2-2.5 cm. long; woods, locally throughout 111. June-July. [S. 

 cordifolia Muhl., nom. subnud.; S. versicolor Nutt.} . S. ovata Flill 

 3. Stem-leaves not cordate. 



4. Calyces short-pilose, the hairs gland-tipped; corolla 12-14 mm. long, 

 puberulent or nearly glabrous; wooded slopes, s. 111. June-July. [S. 



ptlosa of Michx., not Hill; S. pdosa var. hirstita Gray} 



S. ovalifolia Michx. 



4. Calyces canescent, not glandular; corolla 18-20 mm. long, puberu- 

 lent; woods, throughout 111., except the n. counties. June-Sept. [S. 



puhescens Muhl., nom. nud.; S. canescetjs Nutt.} 



S. incana Spreng. 



1. Flowers solitary in the axils of the leaves. 



5. Flowers 16-22 mm. long; wet ground, chiefly in the n. half of the state. 



June-Sept. \_S. galericulata of Am. auth., not L.} 



S. epdohiifolia A. Fiamilt. 



5. Flowers 5-10 mm. long. 



6. Leaves entire or nearly so; nutlets wingless; rhizomes moniliform. 

 7. Pubescence of stem and pedicels spreading. 



8. Leaves gland-dotted beneath; wooded bluffs, local. May-July 



S. parvula Michx. 



