118. Labiatae 217 



5. Flowers 5-10 mm long. 



6. Stem glabrous or puberulent. 



7. Stem glabrous or nearly so; median and lower leaves 

 noticeably crenate; nutlets slender-stalked, conspicu- 

 ously winged; rhizomes filiform; moist ground in woods 

 in the southern two-thirds of 111. May-June. [^S". amhigua 



Nutt.; S. nervosa var. calvijolia Fern.] 



S. nervosa Pursh 



7. Stem puberulent on the angles with minute upwardly 



appressed or cui"V'ed non-glandular trichomes; nutlets 

 wingless; rhizomes moniliform; roadsides and wooded 

 slopes and ridges, common. May-June. [S. ambigua 

 sensu auth., non Nutt.; S. parvula var. ambigua sensu 



Fern.] S. leonardi Epling 



6. Stem and leaves more or less glandular-pubescent; rhizomes 

 moniliform. 



8. Lower leaf-surface with sessile glands; stem evenly pilose; 



rocky woods or ledges, gravelly or sandy slopes, banks, 

 or hills, and in sandy barrens throughout 111. May-June. 

 [.S". parvula var. mollis A. Gray; S. campestris Britt.] 



S. parvula Michx. 



8. Lower leaf-surface with glandular hairs; stem pilose on 



the angles; sandy soil, rare, southern 111 



S. australis (Fassett) Epling 



6. Marrubium L. — Common Horehound 



M. vulgare L. Waste places, roadsides, fields, and open woods, 

 common; nat. from Eur. Jime-Oct. 



7. Agastache Clayton — Giant Hyssop 



l.Stem and branches glabrous or puberident; corolla cream or 

 yellowish; bracts ovate, green; calyx-lobes ovate, 1-1.5 mm 

 long, acutish; roadsides, fields, and open woods, common. July- 

 Oct A. nepetoides (L.) Ktze. 



l.Stem and branches pilosulous; corolla whitish to pale purplish; 

 bracts roundish, abruptly apiculate; calyx-lobes lanceolate, 

 acuminate, 2-2.5 mm long; sandy soil in open woods and along 



roads, infrequent. Aug.-Sept 



A. scrophulariaefolia (Willd.) Ktze. 



8. Nepeta L. — Catnip 



A^. cataria L. Pastures, roadsides, waste places, and open woods, 

 common; nat. from Eur. June-Sept. 



9. Glecoma L. — Ground-ivy 

 G. hederacea L. Frequent in waste places, lawns, along roads, and 

 in moist open woods; nat. from Eur. Apr. -June. Two forms are re- 

 presented in 111.; the usual form has the corolla 10-15 mm long; 

 plants with corollas 16-22 mm long are rarely found. 



