240 DIDYNAMIA.— ANGIOSPERMIA. 



393. BIGNOMA. Trumpet-flower. Bignoniacea. 



B. radicans: leaves pinnate ; leaflets ovate, dent- 

 ate, acuminate ; corymb terminal ; tube of the co- 

 rolla three times as long as the calyx ; stem creep- 

 ing. 

 ' HAB. Banks of rivers. July — Aug. "fo. Stem 

 climbing by 'radicles ; fl. very large, scarl. 



394. RUELLIA. 



R. strepens : erect, hairy ; leaves petiolate, lanceo- 

 late-ovate, very entire ; peduncles 1 — 3-flowered ; 

 segments of the calyx lanceolate, hispid, half as 

 long as the tube of the corolla. 



HAB. Woods. July. U. Stern 8—12 in. high; 

 leav. opp. ; JI. axill. and term., blue or white. 



395. BUCHNERA. 



B. americana : stem simple ; leaves lanceolate, sub 

 dentate, rough, 3-nerved ; spikes with the flower- 

 remote. 



HAB. Sandy woods. Aug. U. A foot high; leav. 

 opp. ; ft. blue. — Plant dries black. 



396. ANTIRRHINUM. Toad-flax. Scrophularicr, 

 *. Stems procumbent. 



I. A. Elatine : procumbent, hairy; leaves alternate, 

 hastate, very entire; peduncles solitary, very long. 

 HAB. Sandy fields. July. 0. Stem 1—2 ft. long ; 

 pedunc. axill. ; ji. small, bl.-wh. §. 



**. Stems erect. 



1. A. Linaria : leaves linear-lanceolate, crowded ; 

 spikes terminal ; flowers imbricate ; calyx smooth, 

 shorter than the spur. 

 HAB. Road sides, &c. June— Nov. 1/. Stem 1— 

 c Zft. high; leav. pale-gr. ; JI. yellow. 



S. A. canadense: assurgent, smooth, mostly simple; 

 leaves scattered, erect, linear, obtuse ; flower- 

 racemose ; scions procumbent. 



