OF ARTS AND SCIENCES. 313 



across the vertex of the capsule in the first instance ; and although at 

 length the fruit may readily split septicidally, even into two cocci, so it 

 does in various Houstonice or Anotides, as is well seen in H. (A.) an- 

 gustifolia, of the United States. 



Hedyotis, Linn,, proper, is well marked by its small, globular, hard 

 and nut-like fruit, either indehiscent or tardily septicidal into closed 

 cocci : and the seeds are peltate but not concave on th§ face ; the 

 corolla is short ; the inflorescence axillary and glomerate ; the stipules 

 are mostly setose ; and the leaves lineate-nervose. 



Scleromitrion, equally Spermacoceous in aspect, differs from Hedyotis 

 in having the fruit loculicidal across the summit, and the seeds of 

 Oldenlandia. 



Oldenlandia has a thin loculicidal capsule, with the very numerous 

 and small seeds angular or globular, mostly obpyramidal or trihedral, 

 not obcompressed nor hollowed on the face. Karamyscheivia of Fischer 

 and Meyer, from the Caucasian region, is an Oldenlandia, near 0. 

 umhellata, with two or more accessory calyx-teeth. 



Kohautia, "■ too well marked in habit and character to be merged 

 into Hedyotis" has the capsule and seeds of Oldenlandia, from 

 which, irrespective of habit, it is distinguished only by the form of 

 the corolla. 



Houstonia, besides the (mostly) elongated corolla, is distinguished 

 from Oldenlandia by the peltate seeds, hollowed or concave on their 

 inner face. These are few or moderately numerous, — never very 

 numerous, as in Oldenlandia. In Euhoustonia the seeds are deeply 

 crateriform or thimble-shaped, and the globular-didymous pod is partly 

 superior.* 



* EUHOUSTONIE^ Americje Borealis. 



1 . Capsula matura vix aut fere semisupera. 



* CoroUse tubus calycem (stepius longe) superans. 



M- Semina globuloso-acetabuliformia, pi. m. scrobiculata, carea hilari profunda sine 



crista mediana, ore rotundo. 



++ Pedunculi plerique axillares, fructiferi nutantes. 

 H. KOTUNDiFOLiA, Mickx. Seminum testa profundius scrobiculata. 



■M- ++ Pedunculi erecti filiformes. Semina subtiliter scrobiculata. 



H. SEEPTLLIFOLIA, Michx. 



H. c^EULEA, Linn. 



VOL. IV. 40 



