BOBAGINACBAE. 267 



3. Hydrophyllum Canadense L. M. p. 763. Woods. Summer. 



^Mcts— Nockamixon. Za?( caster— Peach Bottom (Ca.), York Furnace 

 (Cr.) (Le.), island in Susquehanna below Columbia (Pr.). 



2. MACROCALYX Trew. 

 1. Macrocalyx Nyctelea (L.) Kuntze. M. p. 764. Moist soil. Spring. 

 Philadelphia — Girard Point (Ja.). Bucks — Opposite Trenton (P.). 

 Lancaster— Safe Harbor, York Furnace (Pr.). 



3. PHACELIA Juss. 



Corolla with entire or merely crenulate lobes. 1. P. dubia. 



Corolla with fimbriate lobes. 2. P. Purshii. 



1. Phacelia dubia (L.) Small. M. p. 765. Shaded banks. Spring. 



Bucks — Near Telford (Fr.). Lancaster — York Furnace, Columbia, 

 Porter (B. C). 

 ■2. Phacelia Purshii Buckl. M. p. 765. Moist woods or thickets. Spring. 

 Montgomery— Walnut Hill (VP.). Lancaster— {¥.). 



Family 5. BORAGINACEAE Lindl. Borage Family. 



• Ovary entire or 2-4-grooved; style terminal. 1. Heliotropium. 



Ovary 4-divided or deeply 4-lobed, the style arising from the center. 

 Flowers regular. 



Nutlets arm»d with barbed prickles. 



Nutlets spreading or divergent, covered by the prickles. 



2. Cynoglossum. 

 Nutlets erect or incurved, the prickles on their backs or mar- 

 gins. 3. Lappula. 

 Nutlets unarmed. 



Nutlets attached laterally to the receptacle, sometimes just 

 above their bases. 

 Fruiting calyx not greatly enlarged nor membranous. 



4. Mertensia. 

 Fruiting calyx much enlarged, membranous, veiny. 



5. Asperugo. 

 Nutlets attached to the receptacle by their very bases. 



Scar of the attachment small, flat. 



Corolla salverform or funnelform, its lobes rounded or 

 spreading. 

 Racemes not bracted; corolla-tube short. 



6. Myosotis. 

 Racemes bracted; corolla-tube cylindrie, usually 



slender. 7. Lithospermum. 



Corolla tubular, its lobes erect, acute. 



8. Onosmodium. 

 Scar of attachment large, concave. 9. Symphytum. 



Flowers irregular. 



Stamens included, throat of the corolla closed by scales. 



10. Lycopsis,,, 

 Stamens exserted; throat of the corolla dilated, open. ,,. 



11. Echium.' 



1. HELIOTROPIUM L. Heliotrope. 

 •Fruit 4-lobed, each lobe separating as a 1-seeded nutlet. 



Plant rough-i)uberulent ; leaves oval. 1. H. Europaeum. 



Glabrous, fleshy; leaves linear or spatulate. 2. H. Curassavicum. 



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



