March 20, 1914 
1 V oov 
i 
Vol. XXVII, pp. 61-62 
PROCEEDINGS 
OF THF 
BIOLOGICAL SOCIETY OF WASHINGTON 
A NEW DELPPIINIUM FROM UTAH. 
BY IVAR TIDE8TKOi\I. 
The new species described in this paper has Intherto been 
referred to the northwestern species D. starhi/deuin, first col¬ 
lected hy Cusick in the Blue Mountains, Oregon. 
Delphinium abietorum sp. iiov. 
Perennise radice profunda crassa: caules nietrale.s vel altiores, deorsuiu 
glabri, sursuiu pnbesceutes: folia iiiferiora ad ba.sin fere o-partita, longe 
petiolata, lobis cnneatis ainplis incisis vel lobulatis; canlina siiupliciora, 
d-5-partita: inliorescentia e basi ad partem mediam ramosa vel simplici- 
ter racemosa, plus minusvo dense albido-pnbescens, l)racteis linearibus, 
l)racteolis biins 0 ])positis, racemis dense nniltitloris: bores coernlei vel 
violacei; calcar sepala snperans, cnrvatnin, 1.5 cm. longnm; sepalaoblonga 
nt calcar extus pubescentia: petala superiora albida vel pallide coernlea; 
inferiora coernlea vel violacea: carpella tenia albido-pnbescentia; matnra 
fere erecta, 1.5 cm. longa, puViescentia. FI. Aug. [ Alt. 2700 m.]. 
Type in tbe F. S. National Herbarium [Coville and Tidestrom No. 19], 
collected August 22, 1908, in a draw near tbe watershed of tbe .Muddy 
Creek and Cnniiisou River, Utah, at an elevation of 2700 m. Typical 
flowering and fruiting sjiecimens were also collected on tbe western slope, 
of tbe Wasatch Mountains east of .Mount Pleasant at an altitude of 2700 
m. [Tin. 1870]. It has been observed on Mount Nebo associated with 
llddbeckia occidental is at an elevation of 2200 m. or in the Aspen belt. 
.\t tbe latter elevation its flowering season appears to be 2 weeks earlier 
than in its natural baliitat among tbe firs. 
The sfiecies luw tbe habit and stature of Delphinium Barhepi [D. sco/cn- 
Inruni .subalpinum Cray], from which it is readily ilistingnisbed by its 
pnbe.scence and color of tbe flowers. D. Barbepi has a pubescence of 
yellowish stiff hairs and tbe new species is sfinu'what silky pnbernlent. 
Tbe flowers of D. Barbeyi are generally dark blue with an occasional 
grading into cream-wbitc' or pink. D. abietorum is often associated with 
D. Barbeyi. It is distinguished from another related species—/), ylaucum 
by its pnbe.scent car[)els and from /). stachydenin [/). scopniorum var. 
slachydeurn Cray] by its leaves, ddie leaves of tbe latter are laciniate in 
the manner of /). scopniorum of New Mexico, tbe lobes being linear or 
nearly so. In onr species the leaves have nearly tbe same form as in 
/). Barbeyi. 
11 —Piioc. llioi.. Hoc. W.\SH., Von. XXVI1, T.»lt. 
( 1 ) 1 ) 
