520 



BORAGINACEAE 



1. P. dubia (L.) Small. In moist soil: N. Y. and Pa. to Ga., Mo., 



Kan. and Tex. 



Pa. Telford, Bucks Co. 



2. P. Purshii Buckl. In moist woods or thickets: Pa. to Minn., 



N. Car., Ala. and Miss. 

 Pa. Walnut Hill, Montgomery Co. 

 Also as a waif in Conn. 



Phacelia viscida (Benth.) Torrey has been collected in Conn, as an occasional waif; 

 doubtfully persistent. 



Marilaunidium jamaicen se (L.) Kuntze has also been found as a waif near New York. 



BORAGINACEAE 



Ovary entire or 2-4 grooved; style terminal. 



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

 center. 

 Flowers regular. 



Nutlets armed with barbed prickles. 



Nutlets spreading or divergent, covered by the 



prickles. 

 Nutlets erect or incurved, the prickles on the back 

 or margin. 

 Nutlets unarmed. 



Nutlets attached laterally to the receptacle, some- 

 times just above their bases. 

 Fruiting calyx not greatly enlarged nor mem- 

 branous. 

 Corolla blue, rarely white. 

 Corolla yellow. 

 Fruiting calyx much enlarged; veiny and mem- 

 branous. 

 Nutlets attached to the receptacle bj' their bases. 

 Scar of the attachment small and flat. 



Corolla salverform or funnelform, its lobes 

 rounded. 

 Racemes not bracted; corolla-tube 



short. 

 Racemes bracted; corolla-tube 4-12 

 mm. long. 

 Corolla tubular, its lobes erect, acute. 

 Scar of attachment large, concave. 

 Corolla tubular, 5-toothed. 

 Corolla rotate; anthers erect. 

 Flowers irregular. 



Stamens included; throat of corolla closed by scales. 

 Stamens exserted; throat of corolla dilated, open. 



1. Heliotropium. 



2. Cynoglossum. 



3. Lappula. 



4. Mertensia. 



5. Amsinckia. 



6. asperugo. 



7. Myosotis. 



8. LlTHOSPERMUM. 



9. Onosmodiim. 



10. Symphytum. 



ii. borago. 



12. Lycopsis. 



13. ECHIUM. 



