238 DICOTYLEDONOUS PLANTS. 



3. PERIPLOCA. Linn. 



Calyx 5-clcft. Carol rotate, flat, 5-parted ; orifice surround- 

 ed with an urceolate 5-cleft crown, terminating in 5 filiform 

 awns. Filaments distinct. Anthers cohering, bearded on the 

 back. Pollinia dilated at the apex and united to the corpus- 

 cules of the stigma, solitary, composed of 4 confluent grains. 

 Follicles 2, smooth, divaricate. Seeds comose. 



Pentandria. Digynia. 



P. graxa Linn. : climbing ; leaves opposite, ovate, acuminate ; flow- 

 ers hairy within, and terminal. 



HAB. Western part of N. Y. Aug. J?. Shrub climbing. 

 Leaves on short petioles. Corymbs axillary, on long peduncles. 

 flowers dark purple. It has been found, and I believe growing 

 wild, near Rochester, N. Y., by my friend Dr. Samuel B. Brad- 

 ley. 



ORDER LXXVIIJ. SPIGELIACE^E. land. 



Calyx inferior, regularly 5-parted. Carol hypogynous, 5- 

 lobed ; aestivation valvate. Stamtns 5, inserted into the corol ; 

 pollen triangular, the angles globular. Ovary free, 2-celled ; 

 ovules few ; style articulated with the ovary ; stigma simple. 

 Fruit capsular, 2-celled, 2-valved, the valves turned inwards 

 at the margin, and separating from tho central placenta. Seeds 

 several, small ; albumen copious, fleshy ; embryo very mi- 

 nute ; radicle next the hilum. 



Leaves entire, opposite, with stipules, or a tendency to pro- 

 duce them. 



1. SPIGELIA. Linn. 



Calyx 5-parted. Corol funnel-form ; border 5-cleft, equal. 

 Stamens 5. Jtnthers convergent. Capsule didymous, 2- 

 celled, 4-valved, many-seeded. Pentandria. Monogynia. 



S. marilandica Linn. : stem simple, square, smooth ; leaves all op- 

 posite. 



HAB. Woods. Penn. to Car. W. to Arkansa. !. Slem 6-18 

 **'. inches high. Leaves sessile, ovate-lanceolate. Flowers in a sim- 

 ple secund terminal raceme, large, crimson. Medicinal, nig. 

 Med. Bot. i. 142. Pink-root. Worm- grass. 



ORDER LXXIX. GENTIANE^. Jus*. Lind. 



Calyx monophyllous, 5 10-divided, inferior, persistent. 

 Corol hypogynous, monopetalous, usually regular, withering 



