LTTHEACEAE 87 



128. AMMAIV'JVIA, Houston. 



[Dedicated to Prof. Ammann, of St. Petersburg.] 



Calyx snbcampanulate, 4-angled, 4-lobed, with a tooth at each 

 sinus. Petals 4, or wanting. Stamens 4. Capsule globular, 4- 

 celled, with central placentae. Smooth subaquatics. 



1. A. !i ii mil is, MX. Stems ascending, square; leaves linear- 

 oblanceolate, rather obtuse ; flowers in threes or often solitary, ses- 

 sile; petals 4, orbicular, caducous. 

 HUMBLE AMMANNIA. 



Annual ; stem 4 to 8 inches long, procumbent and branching at base. Leaves % 

 of an inch to an inch and half long, tapering at base to a short petiole. Flowrs 

 greenish, small, upper ones usually solitary, and opposite. 

 Hob. Wet places; Brandy wine: rare. Fl. Aug. Fr. Sept. 



Obs. Collected on the west branch of the Brandy wine, above 

 MARSHALL'S Mill, in 1837, by Mr. JOSEPH M. BARNAKD. 



129. CITPHEA, Jacq. 



[Gr. Kuphos, curved, or gibbous; in reference to the calyx-tube.] 

 Calyx tubular, 12-ribbed, ventricose, gibbous at base; limb 6- 

 toothed. Petals 6, very unequal. Stamens mostly 12. Capsule 

 oblong, 1- or 2-celled, bursting laterally with the calyx-tube. Seeds 

 few, compressed, oval. Clammy herbs : flowers pedunculate. 



1. C. viscoissima,j Jacq. Clothed with a purplish clammy 

 pubescence ; leaves ovate-lanceolate, petiolate ; flowers solitary. 

 MOST VISCID CUPHEA. 



Annual ; stem 9 to 18 inches high, branched. Leaves 1 to near 2 inches long ; 

 petioles %to%&n inch in length. Calyx-tube about half an inch long, contracted 

 at throat ; limb more or less dilated, 6-toothed, and usually with small intervening 

 processes. Petals violet purple, obovate, clawed. Capsule about as long as the 

 calyx-tube, thin and membranaceous, opening before maturity, and exposing the 

 rather large seeds. 

 Hob. Gravelly old fields, and roadsides: frequent. Fl. Aug. Fr. Sept 



ORDER XXXVIII. ONAGRA^CEAE. 



Herbs; leaves alternate or opposite, simple, without stipules; flowers mostly tetra- 

 merous; calyx-Jube adherent to the 2-4-celled ovary, its lobes valvate in the bud 

 or obsolete ; petals convolute in the bud ; stamens as many, or twice as many, as 

 the petals or calyx-lobes. 



SUBORDER I. ONAGRA V CEAE PROPER. 



Calyx-tube often longer than the ovary, bearing the petals (when present) and star 

 mens on its summit; stigma 2- 4-lobed, or capitate; capsule loculicidally 4-celled 

 and 4-valved, or indehiscent; placentae in the axis; seeds without albumen. 



f PETALS 4 ; stamens twice as many, 

 'ISO. EPMLO^BIUJH, L. 



[Gr. Epi Lobou Ion ; meaning a violet on a Pod.] 



Calyx-tube not longer than the ovary. Anthers subovate, erect; 

 pollen not viscid. Capsule long, linear. Seeds comose. Peren* 

 maU. 



