230 PENTANDRIA. MONOGYNIA. pml»x. 



umbelled; segments of the corolla cuneate, emarwinate ; 

 teeth of the calyx subulate, much shorter than the tube of the 

 corolla. IVi I Id. Spec. I. p. 842. Bot. Mag. U 415. Pursk 

 F/. f. p. 161. Elliott Sk. I. p. 249, Ro em. ir Schult. 

 IV. p. 364. 



Boot perennial. Stem procumbent, assurgent. Leaves longer, 

 and, for the most part, finer and more hairy than in P. subu- 

 lata. Flowers generally solitary, forming small terminal co- 

 rymbs. Corolla large, " pale rose-coloured, with a purple 

 star in the centre." Ell., Ph. 



Hab In Pennsylvania. Muhlenberg. May. 

 Resembles very much the preceding species. 



158. POT.KMONIUM. L. 



Calyx campanulate, 5-cleft. Corolla campanulate- 

 rotate; border 5-lobed, erect; tube short, closed by 5 

 stameniferous valves. Filaments bearded at the base. 

 Capsule subrotund, 3-celled; cells many-seeded; 

 valves membranaceo-crustaceous. Seeds oblong, some- 

 what triangular, with a large albumen ; radicle as long 

 again as the cotyledon. Z). Don, in Edin. Phil. Jour. 

 VII. p. 287. Gen. pi. 289. Nu 1 1. Gen. I. p. 127. 

 Juss. p. 136. Latn. III. t. CVI. Roem. '^ 

 Schult. Gen. 111. Nat. Ord. Polemonia Juss. 

 Leaves alternately pinnate, with a terminal leaflet. 



Jacobus-ladder ~ 



P. reptans L. : leaves pinnate ; leaflets about 7 ; ftowers 

 terminal, nodding. W il I d. Spec. I. p. a86. Mich. FL 

 I. p. 142. Pursh FLl.p. \5\. Elliott Sk.l.p.2Gl. 

 J>l' ut t. Gen. 1. c. R em. ^ S chult. W . p. 365. 



Root perennial, creeping. Stem erect, slender, about a foot 

 high, much branched, smooth. Leaves nearly smooth ; leaf- 

 lets often opposite, ovate-lanceolate, 3-nerved, acute. Flowers 

 terminal, somewhat corymbose. Pedicels 1 — 2-fljwered. 

 Calyx about one-third as long as the corolla ; segments ovate, 

 acute. Corolla blue (sometimes white, Mich.); lobes very 

 short, obtuse. Stamens shorter tlun the corolla, unequal ; 

 Jilaments dilated at the base ; anthers roundish. Style a little 

 longer than the stamens ; stigma 3-clcft. 



Hab. In the vicinity of Philadelphia. Barton. May. 



159. DIAPENSIA. L, 



Calyx deeply 5-parted, with 3 bracts at the h\%t. 

 Corolla hypocrateriforni ; border 5-cleft. Filaments 



