RYDBERG: Rocky MouNTAIN FLORA 59 
Malvastrum digitatum Greene, Leaflets 1: 154. 1905. 
Malvastrum dissectum Cockerell, Bull. Torrey Club 27: 87, mainly. 
1900. 
Malvastrum Cockerellu A. Nels. Bot. Gaz. 34: 24. 1902. 
Malvastrum dissectum Cockerellii A. Nels.; Coult. & Nels. New 
Man. Bot. Cent. Rocky Mts. 318. 1909. 
Sphaeralcea leptophylla (A. Gray) Rydb. 
Malvastrum leptophyllum A. Gray, Pl. Wright. 1: 17. 1852. 
Sphaeralcea arizonica Heller, sp. nov. 
Perennial with a woody caudex branching from the base; leaf- 
blades reniform to cordate, 3-5 cm. long, densely stellate on both 
sides, obscurely lobed and crenate; inflorescence paniculate, dense, 
with short branches; calyx densely stellate throughout; its lobes 
ovate, acute, about 3 mm. long; petals pink, about 1 cm. long; 
carpels about 4 mm. long and 1.5 mm. wide, mucronate or short- 
cuspidate, oblong, only about the aa fourth reticulate. 
Differing from S. ambigua in the short calyx-lobes and the 
narrow and dense inflorescence and from S. marginata in the dense 
stellate pubescence, which extends even to the calyx. 
Arizona: Flagstaff, June 16,1898, MacDougal 120 (type, in herb. 
N. Y. Bot. Gard.) ; 30 miles east of Flagstaff, July 18, 1893. Wooton; 
Fort Verde, May 4, 1888, Mearns 225; same locality 1887, 150; Hol- 
brook, June 18, 1901, L. F. Ward; Ash Fork, June Io, 1883, 
Rusby 538. 
Urau: St. George, Apr. 14, 1880, M. E. Jones 1660; proposed 
dam site, near Wilson Mesa, Grand Co., July 1, 1911, Rydberg & 
Garrett 8386; S. Utah, 1877, Palmer; 1874, Parry 25. 
Sphaeralcea subrhomboidea Rydb. sp. nov. 
Perennial with a woody caudex, branched at the base; stems 
stellate, 2-4 dm. high; leaf-blades rhombic in outline, 2-5 cm. 
long, stellate but not densely so, grayish-green, cuneate at the 
base, 5-ribbed, 3-cleft about half way down, the divisions 2-4- 
lobed; inflorescence a dense virgate panicle; calyx densely stellate, 
4-5 mm. long; lobes broadly ovate, obtusish; corolla scarlet, 8-9 
mm. long; fruit depressed-globose; carpels nearly round, obtuse, 
the lower half reticulate on the faces; seed solitary, without 
filiform attachment. 
