Tas. 6874, 
GENTIANA Bicetovit. 
Vative of New Mewico. 
Nat. Ord. GENTIANE®.—Tribe SwERTIE. 
Genus GenTrana, Linn.; (Benth. et Hook. f. Gen. Pl. vol. ii. p. 815.) 
GeEyTiana (Pneumonanthe) Bigelovii; caulibus e radice perennante adscenden- 
tibus pedalibus teretibus foliosis subscaberulis, foliis sessilibus lineari-oblongis 
obtusis v. subacutis coriaceis 1-nerviis supremis flores longe superantibus, 
floribus axillaribus in spicas foliosas elongatas dispositis, calycis scaberuli 
lobis 5 angustis tubo cylindraceo tereti paullo brevioribus, corolle 
violaceze tubo cylindraceo lobis brevibus ovatis subacutis erecto-patentibus 
dorso lineis crenulatis in tubum decurrentibus notatis, lobulis accessoriis 
bipartitis segmentis subulatis, antheris cordatis, capsule stipite brevi fistuloso, 
seminibus anguste alatis. 
G. Bigelovii, Gray in Proc. Amer. Acad. vol. xix. p. 86; Synopt. Fl. of N. 
Am., Gamopet. p. 406. 
G. affinis, Torr. Bot. Mex. Bound, p. 157. 
Dr. Gray, the author of this species, remarks that it had 
long passed as an extreme form of (. affinis, but that “ it 
decisively differs by its oblong rather than funnel-form 
corolla with shorter lobes, and by the salient crenulate or 
roughened ridges which in the bud externally border the 
infolded plicze; the stipe (of the capsule) is shorter and 
broader, and completely fistulous, so that some of the 
seeds fall into it—even to the bottom.” The two species 
are indeed very near, and meet (if they do not cross) at 
the limits of their areas of distribution in Colorado. Our 
numerous specimens of affine may, however, be distinguished 
at first sight by the shorter and comparatively broader 
leaves, especially the floral ones, the usually more 
capitate inflorescence (though in some forms this is 
spicate), and the upper leaves rarely exceeding the flowers. 
The crenulate ridges on the corolla externally seem to 
afford a very constant character in G. Bigelovii, as does 
the stipes of the capsule. In the form of the corolla and 
length of its lobes I recognize no material difference 
between the two. G. affinis varies much in the size and 
MAy Ist, 1886. 
