RUBIACEAE 289 



Fla., Neb. and Tex. — Pennsylvania : Northampton ; Monroe; Bucks ; 

 Chester ; Pike ; Lancaster ; Dauphin ; Frankwn ; Huntingdon ; 

 Susquehanna ; Allegheny. 



3. Plantago, lanceolata L. Ribwort. Rib-grass. (Man. p. S57 ; 

 I. 'F. f. sjSo.) In fields and waste places, N. B. to the N. W. Terr., 

 B. C, Fla. and Kans. Nat. from Eu. — Pennsylvania : Northampton ; 

 Bucks ; Delaware ; Chester ; Lancaster ; Franklin ; Hunting- 

 don ; Allegheny. 



4. Plantago cordata Lam. HearT-leaved or Water Plantain. 

 (Man. p. 85S ; I. F. f. 338^.) In swamps and along streams, N. Y. to 

 Ala., Mo. and La. — Pennsylvania : Bedford. 



5. Plantago aristata Michx. Large-bracted Plantain. (]Mau. 

 p. 859 ; I. F. /. 33S/.) On dry plains and prairies, 111. to La. and Tex., 

 S. Dak., B. C. and N. Mex. Adv. as weed in the eastern States from 

 Me. to Ga. — Pennsylvania : Northampton ; Bucks ; Delaware, Tin- 

 icum ; ALLEGHENY. 



6. Plantago Virginica L. Dwarf or White Dwarf Plantain. 

 (Man. p. 859 ; I. F. / 33S8.) In dry soil. Conn, to Fla., 111., Mo., Ariz, 

 and Mex. — Pennsylvania : Pike ; Northampton ; Bucks ; Delaware ; 

 Chester; Lancaster; Franklin; Lafayette; Allegheny. 



7. Plantago elongata Pursh. Slender Plantain. (Man. p. 859 ; I. 

 F-/ 3389. ) In dry sandy soil. Conn, to N. Y., Va., La., 111., S. Dak. and 

 Tex. — Pennsylvania : Philadelphia. 



8. Plantago heterophylla Nutt. Many-seeded Plantain. (Man. 

 p. 859 ; I. F./. 3390.) In moist soil, N. J. to Fla., Tenn., Tex. and Calif. 

 — Pentisylvania : Philadelphia, ballast. 



9. Plantago arenaria W. & K. Sand Plantain. (Man. p. 859 ; I. 

 F. f. 3391- ) Eastern United States. Adv. or fugitive from Eu. — Penn- 

 sylvania : Philadelphia, Mifflin St. wharf. 



Order 7. RUBIALES. 

 Leaves with stipules. Fara. i. Rtjbiaceae. 



Leaves without stipules. Fam. 2. Caprifoliaceae. 



Family i. RUBIACEAE B. Juss. Madder Family. 



Leaves merely opposite by pairs (rarely in whorls of 3 in Ceplialanlhus). 

 Ovules and seeds several or many in each cavity of the ovary. 



I. HOUSTONIA. 



Ovules and seeds solitary in each cavity of the ovary. 

 Shrubs or trees : flowers in dense, globular heads. 2. Cephalanthus. 



Herbs : flowers axillary to leaf -like bracts. 

 Flowers 2 together, with their ovaries united : fruit drupaceous. 



3. Mitchella. 

 Flowers with their ovaries distinct : fruit of 2 dry carpels. 



4. DiODIA. 



Leaves apparently whorled, the stipules foliaceous. 

 Corolla rotate : sepals minute or obsolete. 5. Galium. 



Corolla funnelform : sepals prominent. 6. Sherardia. 



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