210 American Midland Naturalist Monograph No. 7 



13. Corolla greenish-white 10. Onosmodium 



13. Corolla blue 13. Anchusa 



9. Scar of nutlets large, concave; throat of the corolla with 5 

 lanceolate, acute, denticulate-margined appendages; coarse 



pubescent perennials with wide leaves 14. Symphytum 



2. Corolla irregular, blue; stamens unequal, exserted ; nutlets wrinkled; 

 plants hispid-pubescent 1 1 . Echium 



1. Heliotropium L. — Heliotrope 



1. Leaves spatulate to linear. 



2. Plant glabrous, glaucous, succulent; leaves spattilate; in sandy 

 or saline soil, w. 111., in Menard and St. Clair counties; 



adv. from s. U.S. June-Sept H. curassavicum L. 



2. Plant strigose-canescent ; leaves linear; rocky ledges, southwest- 

 ern 111 - H. tenellum (Nutt.) Torr. 



1. Leaves o\ate or o\al, long-petioled; plants pubescent; corolla blue, 

 4-6 mm in diameter; fruit strongly ribbed, deeply 2-lobed; 

 waste grotmd in the southern half of 111.; nat. from Asia. 

 July-Nov H. indicum L. 



2. Cynoglossum L. — Hound's-tongue 



1. Stem pilose; corolla reddish or white; lower leaves spatulate; 

 inflorescence many-flowered, leafy; plant biennial; pastures 

 and waste places, common; nat. from Eiu". Jime. Common 

 Hoimd's-tongue C. officinale L. 



1. Stem hispidulous; corolla blue; lower leaves oval; inflorescence 

 few-flowered, leafless; plant perennial; woods in s. 111. May. 

 Wild Comfrey C virginianum L. 



3. Hackelia Opiz 



1. Nutlets of the globose fruit equally short-prickly over the whole 

 back; woods and thickets throughout 111. July-Sept. [Lappula 

 virgiyiiana (L.) Greene] H. virginiana (L.) I. M. Johnst. 



1. Nutlets of the pyramidal fruit only marginally prickly, the backs 

 merely miniculate: Apple River, Jo Da\iess Co., Pepoon & 



Moffatt in 1896; F. J. Hermann in 1937 



H. americana (A. Gray) Fern. 



4. Lappula Moench — Stickseed 



1. Nutlets with a double row of prickles; waste j^laces. pastiu'es, 

 roadsides, common throughout 111.; nat. from Em-. June-Oct. 

 European Stickseed [Echinospermum lappula (L.) Lehm. ; 

 L. echinata Gilib., nomen invalidum] L. myosotis Moench 



1. Nutlets with a single row of prickles; adv. from western U.S.; Rock 

 Island Co. [L. redowskii var. occidentalis (S. Wats.) Rydb.] 

 L. occidentalis (S. Wats.) Greene 



