Vol. XXVI, pp. 121-122 May 21, 1913 



PROCEEDINGS 



OF Till 



BIOLOGICAL SOCIETY OF WASHINGTON 



NOVITATES FLORAE ITAHENSIS. 

 IVAl; TIDESTROM. 



During the month of June and the early part of July, 1909, 

 duties took me over the very interesting region — the Kaibab 

 Plateau — lying east of Kanab, Utah. The region is part of the 

 Buckskin Mountains, ami it is essentially a yellow pine area, 

 except iii the immediate vicinity of the basin, or at 1500 in. 

 elevation, and above 270<> m. where spruces and firs abound. 



Among the yellow pine I found among other plants very 

 interesting specimens of Aquilegia,* one of which was described 

 as A. pinetorum. Along with this species 1 found also a Del- 

 phinium which I have not Been able to refer to any of the 

 hitherto known species and for which the following diagnosis is 

 proposed : 



Delphinium pinetorum sp. now 



Perenni- ( ?) e radice tuberifera, 2-4 dm. altitudine, deorsuru pubescens 

 vel glabrescens, sursum pubescens: caules panci: folia radicalia tenuiter 

 petiolata; laminis 2 cm. plus minusve latis, ternatis, partibus fere ad 

 basin divisis, laciniis linearibus 1 mm. plus minusve latis, apice albido- 

 calloso: folia caulina simpliciora: flores azurei in racemo siraplici ; 

 pedunculis tenuibus ascendentibus, bracteis filiformibus quam pedunculis 

 brevioribus: calcar aliquantulum enrvatus sepala superans; sepalis 

 oblongis acutis azureis vel coeruleis; petala superiora albida, emarginata 

 purpureo-venosa ; inferiora azurea barbata bifida: carpella tenia sericea, 

 matura fere erecta 1 cm. v. longiora. Floret Junio altitudine 2400 m. 



Type in the 0". S. National Herbarium [Tidestrom 2375], collected at 

 an altitude of 2400 m. on the Kaibab Plateau, northern Arizona, where it 

 grows among Pinus ponderosa. Also collected on the (Jncompahgre 

 Plateau near Ridgway, Colorado [Tm. 2140], and in the La Sal Moun- 

 tains, eastern Utah, by Mr. MeHenthin of the Forest Service. 



Distinguished by the linear, sometimes filiform lobes of its leaves. It 



er. .Midland. Natur. 1: 165, 1910. 

 29— Proc. Biol. Soc. Wash., Vol. XXVI, 1913. (121) 



