218 American Midland Naturalist Monograph No. 7 



10. Physostegia Benth. — Obedient Plant 

 1. Corollas 18-22 mm long; leaves oblanceolate or lanceolate, thin, 

 the upper nearly as large as the median ones; anthers 1-1.5 

 mm long; calyx campanulate; alluvial soil, local. Aug.-Oct. 



P. speciosa Sweet 



1. Corollas 2.5-3.5 cm long; leaves mostly linear-lanceolate, firm, the 

 uppermost much reduced; anthers 1.6-2 mm long; calyx tubu- 

 lar-campanulate; prairie soil, often along railroads, local, 

 July-Oct. [P. angustifolia Fern.] P. virginiana (L.) Benth. 



11. Dracocephaium L. — Dragonhead 



{Moldavica Adans. ) 



D. parviflorum Nutt. Diy soil, rare; Kane, Lee, Menard, Stark, 

 Vermilion, and Winnebago counties. May-Aug. 



12. Synandra Nutt. 



^S". hispidula (Michx.) Britt. Wooded ravines, rare; known to occur 

 in Jackson Co. May-June. 



13. Prunella L. — Selfheal 



P. vulgaris L. Carpenter-weed. Roadsides, waste places, fields, and 

 open woods, common; nat. from Eur. June-Oct. 



14. Leonurus L. — Motherwort 



1. Calyx much shorter than the corolla; lower leaves palmately 3- 

 to 5-lobed; corolla pale lilac, 8-10 mm long; waste places, 

 fields, roadsides, and open woods, common; nat. from Eur. 

 May-Aug L. cardiaca L. 



1. Calyx nearly as long as the corolla; lower leaves coarsely toothed; 

 corolla pink, 5 mm long; waste places, occasional; nat. from 

 Eur. June-Sept. Lion's tail L. marrubiastruni L. 



15. Galeopsis L. 



1. Stems bristly-hairy; nat. from Eur.; Boone, Cook, and Hender- 

 son counties. Hemp-nettle G. tetrahit L. 



1. Stems with soft appressed hairs; adv. from Eur.; Cook Co 



G. ladanum L. 



16. Lamiuni L. — Dead-nettle 



1. Corolla 2-2.5 cm long; leaves usually white-marked, ovate, 

 petioled; calyx sparingly pubescent or nearly glabrous; nutlets 

 3 mm long; plants perennial; waste places, occasional; adv. 

 from Eurasia; scarcely established in 111. May-July. Spotted 

 Dead-nettle .-. L. maculatum L. 



1. Corolla less than 2 cm long; leaves not white-marked; nutlets 2 

 mm long; annuals or biennials. 



