Macbride and Payson — Plants from Idaho 63 
small wingless or nearly wingless seeds. The caudex of Nuttall’s 
species becomes in age much branched so that the stems are then 
more numerous than they ever are in A. nubigena. A. acutina and 
A. tenuicula Greene, Leaflets ii. 82 (1910) are scarcely to be dis- 
tinguished from A. microphylla Nutt. 
EPprILoBIUM OBCORDATUM Gray is not uncommon in the Sierra 
Nevada of California and is known from northern Nevada by a 
specimen secured by Watson in the East Humboldt Mountains. 
Recently Cusick has collected it in the Strawberry Mountains of 
eastern Oregon. Its discovery in the Sawtooth Mountains of 
central Idaho is not, therefore, particularly surprising but never- 
theless this apparently unrecorded extension in its range seems 
worthy of note. Our collection bears number 3705 and was found 
growing in rock-crevices at an altitude of 10,000 ft. 
Peps ae a PAUCIFLORUM (Durand) Greene, var. exquisitum, 
g m gracilum 1-1.5 dm. altum: foliis anguste 
cbtakesoiadis abbeas basi in petiolum attenuatis 4-6 cm i 
5-8 mm. latis; floribus 1-4; peices eas sed 1—1.5 em. longis; 
abc lobis solum circa 10 mm. lon AHO: alpine basin, 
y Mts., Custer Co., Aug. 15, 1916, “aawids & Payson, no. 
3747 Crres, ‘Gray Her ). 
The well-known Dodecatheon pauciflorum is common in typical 
form in the mountains of southern Idaho. It is normally a 
very robust plant with numerous large showy flowers and ample 
leaves. It was a distinct surprise, therefore, upon studying the 
plant described above to find, except for its uniformly much smaller, 
size in all parts, that it was referable to D. pauciflorum. Never_ 
theless it seems almost incongruous to refer this attractive and 
dainty shooting star which was abundant on the dryer portions of 
the grasslands of an alpine meadow to Durand’s plant which is 
typically of much lower altitudes and which presents an aspect so 
different. Accordingly we are designating this small isolated form 
as a new variety. 
theon exilifolium, spec. nov., mediocriter robustum 
longis, 1-1.5 em. latis acutis margine integris vel paullo undu- 
latis; umbella 2-6 floris; calyce 5-partita, laciniis ight rom 
acuminatis 5-7 mm. longis; corollae tubo flavo, lobis circa 12 mm 
longis basi albis caeterum rubr ro-purpureis; staminibus distncts, 
‘a 
