Plants of the Rocky Mountains—Supplement III. [336] 43 
C. tenuiflora. Benth., FL Hartw. No. 191, as Bentham intimates, 
should probably include C. longiflora , Kunze, and C. canescens, Benth., 
(which is Gregg’s No. 434, 610, and Coulter’s No. 1354), all from Mexico. 
C. Orizaba I have not seen, unless Coulter’s No. 1352 and 1353 be¬ 
long to it. 
C. fissifolia, Linn. f. (No. 835, coll. Venezuel. Fendler). To this 
Weddell refers all the five other South American species of this section, 
including even C. integrifoliq , Linn. f. 
C. laxa, Gray in Bot. Mex. Bound., p. 119, of Arizona (coll. C. Wright, 
No. 1490), has a broader calyx and corolla than any of its allies, the for¬ 
mer very thin-membranaceous, colored, and with obtuse teeth, the galea 
slightly falcate; the leaves thin and not dilated at the insertion. 
§ 2. EUCHROMA (inch Callichroma). Calyx antice et postice fissus, 
segmentis integris emarginatis vel bifidis. 
I have nothing to say of the six Mexican and South American species 
in the Prodromus. The proper North American ones I understand as 
follows: 
* Radice annua vel bienni. 
Integrifolice. 
C. affinis, Hook. Arn. Folia lineari seu lanceolato-attenuata, flo- 
ralia raro trifida: flores pi. m. pedicellati: calyx usque ad medium bifidus, 
segmentis *aepiur bi r #■«> at? • 
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