364 FLORA OF SOUTH AMERICA. 



crenatis basi rotundatis subcordatisve utrinque villosulis, 

 calycis ampli truncati margine denticulato v. obscure 5-lobo, 

 corollae glabriusculae tubo calyce duplo longiore. — Rocks, 

 British Guiana, Schomburgk. 



Herba semipedalis, in omnibus partibus multo minor 

 quam T. villosa, et minus villosa. Calyx 5 lin. longus, mar- 

 gine inaequaliter denticulatus. Corollae tubus 10 lin. longus, 

 basi postice leviter gibbus, limbus amplus patens, lobis 

 rotundatis. Stamina basi tubo inserta inclusa, didynama 

 cum rudimento quinti, antheris liberis. Stylus apice infun- 

 dibuliformi-dilatatus. Ovarium ovatum villosum. Glandula 

 postica magna, antica nulla. 



Genus Tussacia, a Besleria valde distincta, corollam habet 

 stamina capsulam et semina Episcia, a qua differt imprimis 

 calyce. Herbae sunt v. suffrutices, erectae, basi radicantes. 

 Folia supra medium caulis approximata, opposita. Pedun- 

 culi axillares, umbellatine pluriflori. Flores erecti. Calyces 

 coccinei. Corollae aurantiacae. 



Amongst the Gesneriacea in the collection I had inadver- 

 tently placed a specimen of a very curious shrub, which 

 upon examination turned out to be a new genus of Scrophu- 

 lariacece, allied to Pentstemon, but differing in habit, in the 

 calyx, and in a very remarkable forked sterile stamen, having 

 at first sight the appearance of a style and stigma. My 

 specimen is in some respects much injured, and I have not 

 been able to ascertain the precise inflorescence, but the plant 

 is so remarkable that I here insert a character as complete as 

 the specimen will admit of, regretting that I had overlooked 

 it in working up the order for De Candolle's Prodromus. 



912. Digomphia laurifolia, gen. nov. Scrophulariacearum 

 e tribu Cheloniearum. — Roraima, Schomburgk, 1st coll. n. 

 1049. 



Char. gen. Calyx tubuloso-campanulatus, 5-plicatus, 

 deraum 3-5-fidus. Corolla tubulosa, incurva, fauce campa- 

 nulata, limbi lobis 5 latis subaequalibus. Stamina fertilia 4, 

 didynama, inclusa; quintura sterile exsertum, apice bifidum, 



