258 BORRAGINACEAE 



Nutlets erect or incurved, with prickles in the back or sides. 



3. L,APPULA. 



Nutlets unarmed. 

 Nutlets attached laterally to the receptacle. 



Mature calyx not markedly enlarged or membranous. 



4. Mertensia. 

 Mature calyx much enlarged, membranous, veiny. 



5. ASPERUGO. 



Nutlets attached to the receptacle by their bases. 

 Nutlet with a small flat scar where attached. 

 Corolla funnelform or salverform ; lobes obtuse, spreading. 

 Racemes without bracts. 

 Racemes with bracts. 

 Corolla tubular ; lobes acute, erect. 

 Nutlet with a large hollow scar where attached. 

 Corolla tubular. 

 Corolla rotate. 

 B. Corolla irregular. 

 Stamens included : corolla throat closed with scales. 

 Stamens exserted : corolla-throat dilated and open. 



1. HELIOTROPIUM L. 



Fruit 4-lobed, each lobe separating as a i -seeded nutlet. 

 Leaf -blades of an oval type : foliage puberulent : calyx hair5'. 



1. H. Europaeum. 

 Leaf-blades of a linear or spatulate type : foliage glabrous : calyx glabrous. 



2. H. Curassavictini. 

 Fruit 2-lobed or of 2 carpels. 3. H. Indicum. 



1. Hellotropium Europaeum L. European Hei.ioTropE. (Man p. 

 767 ; I. F.y". 3014.) In waste places, N. Y. and Pa. to Fla. — Peiifisylva- 

 nia : Philadelphia, on and about ballast. 



2. Heliotropium Curassavicum L. Sea-side Heliotrope. (Man. 

 p. 767 ; I. F. /. 3015. ) In dry, saline soil, Man. and the N. W. Terr, to 

 Neb. and Tex. On the Pacific Coast from Ore. to Mex. In ballast 

 about the northern seaports. — Pennsylvania : Philadelphia, ballast ; 

 Bucks. 



3. Heliotropium Indicvun L. Indian Heliotrope. (Man. p. 768; 

 I. F. / 3018.) In waste places, N. C to 111., Fla., and Tex. Nat. from 

 India. Ballast about the northern seaports. — Pennsylvania : Philadel- 

 phia, ballast ; Bucks. 



2. CYNOGLOSSUM L. - 



Plants biennial, softly pubescent : stem copiously leafy to the top : nutlets 



flat: naturalized species. i. C. officinale. 



Plants perennial, hirsute : stem terminated by a long peduncle : nutlets con- 

 vex : native species. 2. C. Virginicum. 

 1. Cjmoglossum officinale L. Hound's-tongue. (Man. p. 76S; I. F. 

 /• 3019- ) ^^ fields and waste places, Quebec and Ont. to Minn., Man., N. 

 C. and Kans. — Pennsylvania: Northampton; Bucks; Delaware; 

 Chester; Lancaster; York; Allegheny. 



