288 PLANTAGINACEAE 



1. RUELLIA L. 



Calyx-lobes linear-lanceolate : capsule rather longer than the calyx. 



I. R. sirepens. 

 Calyx-lobes linear-filiform : capsule shorter than the calyx. 2. R. ciliosa. 



1. Ruellia strepens L. Smooth Ruellia. (Man. p. 854 ; I. F. 

 /. 3SJI.) la dry woods, Pa. to Wis., Fla. and Tex. — Pennsylvania: 



Northampton ; L.\ncaster ; Franklin. 



la. R. strepens micrantha (Engelm. & Gray) Britton. (Man. p. 

 854.) Range of type. Franklin. 



2. Ruellia ciliosa Pursh. Hairy Ruellia. (Man. p. 854; I. F. 

 f. SS72. ) In dry soil, N. J. and Pa. to Fla., Mich., Kans. and La. — Penn- 

 sylvania : Fr.\nklin. 



2. DI ANTHER A L. 



1. Dianthera Americana L. Dense-flowerEd Water Willow. 

 (Man. p. 855 ; I. F. /. 3374.) In water and wet places, Ont. to Mich., 

 Kan., Ga. and Tex. — Pennsylvania : Bucks; Chester; Lancaster; 

 Dauphin; Franklin; Mifflin; Huntingdon; Bradford; Luzerne; 

 Cambria ; Allegheny. 



Order 6. PL ANT AGIN ALES. 



Family i. PLANTAGINACEAE Lindl. Plantain Family. 



1. PLANTAGO L. 



Plants acaulescent : flowers in terminal spikes. 



Corolla-lobes reflexed or spreading in fruit, not converging over the top of 

 the pyxis. 

 Leaves with widely dilated blades. 

 Seeds several or many in each pyxis. 

 Pyxis ovoid, circumscissile at about the middle. i. P. major. 

 Pyxis oblong, circumscissile much below the middle. 



2. P. Riigelii. 

 Seeds 2-4 in each pyxis. 

 Flowers or flower-clusters contiguous : leaf-blades narrow to the base 



parallel-ribbed. 3. P. lanceolala. 



Flowers or flower-clusters separated : leaf-blades, at least some of 

 them, cordate, not parallel-ribbed. 4. P. cordata. 



Leaves with linear blades. 5. P. aristata. 



Corolla-lobes erect and converging over the top of the pyxis. 

 Stamens 4: leaf -blades spatulate to oblong or obovate. 6. P. Virginica. 

 Stamens 2 : leaf-blades linear-filiform. 

 Pyxis slightly longer than the calyx, about 4-seeded. 7. P. elongata. 

 Pyxis twice as long as the calyx, 8-20-seeded. 8. P. heterophylla. 



Plants caulescent : flowers terminating axillary peduncles. 9. P. arenaria. 



1. Plantago major L. Common Plantain. (Man. p. 857; I. F, 

 f. 337S.) In waste places, nearly throughout N. Am. Mostly nat. from 

 Eu. — Pennsylvania : Northampton ; Bucks ; Delaware ; Chester ; 

 Susquehanna ; Erie, Presque Isle ; Allegheny. 



2. Plantago Rugelii Dec. RuGEL's Plantain. (Man. p. 857; I. F. 

 f- 3379-) la fields, woods and waste places. Me. and Ont. to S. Dak., 



