216 American Midland Naturalist Monograph No. 7 



ing oval leaves purplish beneath; corolla 

 purple, 8-9 mm long, puberulent; stamens 4 

 24. Clinopodium 



1. Teucrium L. — Wood-sage 



1. Calyces and upper part of stem pannose, with short, somewhat 

 curved, glandless hairs; corolla about 1.5 cm long; moist 

 ground, common. June-Aug -.. T. canadense L. 



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

 somewhat glandular hairs; corolla 8-12 mm long; moist 

 ground, locally in the northern two-thirds of the state. July- 

 Sept. [T. boreale Bickn.] T. occidcntale A. Gray 



2. Ajuga L. — Bugleweed 



A. genevensis L. Waste ground, fields, roadsides, occasional; es- 

 caped from cult. ; native of Eur. ; Cook, Du Page, and McHenry coun- 

 ties. May-July. 



3. Isanthus Michx. — False Pennyroyal 



/. hrachiatus (L.) BSP. Gravelly or sandy soil along roads or in 

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



4. Trichostema L. — Bluecurls 

 T. dichotomurn L. Sandy soil in open woods, rare. 



5. Scutellaria L. — Skullcap 



1. Flowers in axillary or terminal racemes. 



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

 lent above; moist ground, common. July-Sept 



S. lateriflora L. 



2. Flowers 12-25 mm long. 



3. Leaves cordate; stem and inflorescence softly glandular- 

 pubescent; corolla 2-2.5 cm long; woods, locally through- 

 out 111. June-July. Heart-leaved Skullcap [S. cordifolia 



Muhl.; S. versicolor Nutt.] S. ovata Hill 



3. Leaves narrowed at the base. 



4. Stem pilose; calyces glandular-pilose; corolla 12-16 mm 

 long; wooded slopes, s. 111., rare. June-July. Hairy 

 Skullcap [S. ovalifolia Pers.; S. pilosa sensu Michx., non 



Hill] S. elliptica Muhl. 



4. Stem puberulent; calyces canescent, not glandular; corolla 

 18-20 mm long, puberulent; woods, extending north- 

 ward to Vermilion and Peoria counties. June-Aug. 

 Downy Skullcap [S. canescens Nutt.; S. serrata sensu 



auth., non Andr.] S. incana Biehler 



1 . Flowers solitary in the axils of the leaves. 



5. Flowers 16-22 mm long; wet ground, chiefly in the northern 



half of the state. June-Sept. [S. epilobiijolia A. Hamilt.] 



S. galericulata L. 



