64 Contributions from the Gray Herbarium 
basi purpureis; antherae 7-8 mm. longae acutiusculae; capsula 
calycem non superans, apice circumscissa demum 10 valvis bane 
scens. —Ipano: alpine basin west of Russian John Ranger 
Station, Smoky Mts., Custer Co., Aug. 13, 1916, Macbride & 
Payson, no. 3714 (TyPE, Gray Herb.). 
This lovely plant is to be regarded as an addition to the group of 
closely related forms of which D. Jeffrey Van Houtte is the type. 
Hall in Univ. Cal. Publ. Bot. iv. 202 (1912) has given a careful 
review of this group of species and has shown how variable D. 
Jeffreyi is. Nevertheless this Idaho plant can scarcely be con- 
sidered, it seems to us, a mere variant of that typically broad- 
leaved species since it lacks the purple ring on the corolla-throat 
that is present in D. Jeffreyi. Moreover, as shown by Hall, the 
flowers of the latter are normally tetramerous while those of our 
plant are normally pentamerous. One variant of D. Jeffreyz, var. 
redolens Hall, is 5-merous usually but this plant is totally different 
in other respects from D. exilifolium. In aspect alone our species 
resembles D. alpinum (Gray) Greene and until the technical char- 
acters are observed might easily be mistaken for that plant. It is 
interesting that this unique species was found in the same alpine 
basin in which D. pauciflorum, var. exquisitum grew but whereas 
the latter occupied the dryer portions of the meadow-lands this 
plant flourished only in the moister areas. 
GENTIANA SIMPLEX Gray. The range of this plant has long been 
known to extend from eastern Oregon to the Sierra Nevada of 
California but none of the books record its occurrence in Idaho 
and there are no specimens from that state in either the Gray or 
Rocky Mountain herbaria. Our number 3638 from Custer County, 
Idaho, differs from the Californian specimens in the nearly or quite 
entire corolla-lobes. These, in plants from the Sierra Nevada are 
distinctly erose or subfimbriate. The Oregon collections, however, 
exhibit this character usually in a degree much less pronounced 
and occasionally a plant may be found which has the lobes as 
nearly entire as in our material. 
GILIA AGGREGATA (Pursh) Spreng., forma aurea, f. nov., corolla 
aurea. —IpaHo: Martin, Blaine Co., July 7, 1916, Macbride & 
Payson, no. 3082 (Typ, Gray He rb.). 
The golden-yellow corollas of this plant were in striking contrast 
to the vivid scarlet flowers of the typical form, common in the 
