122 DIDYNAMIA— ANGIOSPERMIA. Euphrasia. 



Dr. Richardson distinguished this species, from our common R. 

 Crista galli, by its greater size, copious branches, narrower 

 leaves, and smaller powers with a purple (upper) lip. Ehrhart 

 has characterized it by the incurved tube of the corolla, which in 

 the former is straight. Mr. Backhouse, to whom I am obliged 

 for numerous wild specimens, says it may be known at first 

 sight by its greater size, being 2 feet high, much branched, and 

 bushy ; its much denser spikes ; and its yellowish bracteas, each 

 of which terminates in an elongated green point. The seg- 

 ments of the upper lip of the corolla are wedge-shaped, and 

 purple. Germen narrower, and more tumid, than in R. Crista 

 gain. Style prominent. Nectary heart-shaped, more spread- 

 ing, and greenish. The seeds are thick at the edge, and not 

 quite destitute of a membranous margin, but this is much nar- 

 rower than in the former. Prof. Afzelius long ago assured 

 me that R. major of Ehrhart differed in its seeds from our com- 

 mon Crista galli. The Alectorolophus n. 314, of Haller, which 

 is less branched, with broader leaves^ and a hairy ca/yx, appears 

 very distinct from our R. major, and more allied to R. Crista 

 gain. 1 have R. major gathered by Mr. Davall, on some of the 

 loftiest of the mountains of Switzerland. 



305. EUPHRASIA. Eye-biiglit. 



Linn. Gen. 304. Juss. 100. Fl. Br. 650. Tourn. t. 78. Lam. 

 t.5\8. Gcertn. t. 54. 



Nat. Ord. see n. 303. 



Cal. tubular, cylindrical, ribbed, permanent; the margin 

 in 4 deep, equal, pointed teeth. Cor. ringent, open ; tube 

 the length of the calyx, cylindrical ; throat short, some- 

 what wider; limb variable in size; its upper lip slightly 

 concave, with several notches; lower spreading, in 3 deep, 

 more or less unequal, obtuse, cloven, or inversely heart- 

 shaped, lobes. Filam. thread-shaped, directed towards 

 the upper lip. Anth. incumbent, large, of 2 roundish 

 lobes pointed at their base, the points of the lower an- 

 thers elongated into straight bristly spines, of unequal 

 lengths. Germ, ovate. Style thread-shaped, as long as 

 the stamens. Stigma obtuse, undivided. CajJS. oblong, 

 obtuse, compressed, of 2 cells and 2 membranous valves. 

 Seeds several, minute, elliptic-oblong, compressed, nu- 

 merously furrowed longitudinally at each side. 



Branched herbs of humble growth, smooth or downy, not 

 aromatic. Leaves opposite, sessile, either ovate and ser- 

 rated, or linear and entire. Fl. in leafy spikes, nume- 

 rous, either variegated or yellow. 



