February 29, 191 2 . 21 



THE FLORA OF THE RUBY MOUNTAINS— IV 

 By a. a. Heller 



Apparently only one of the canyons of the South Fork has 

 received a name — Rattlesnake canyon, the southernmost one. 

 On Auo^ust nth we started up what may be called the middle 

 cinyon, the way leading for several miles along a stream com- 

 ing from the adjoining canyon on the north, then changing to a 

 broad, low ridge, which was crossed at about 7000 feet, when 

 we entered the proper canyon. Here, a short distance above the 

 stream, on the sage brush covered slope, but in fairly moist soil, 

 one of the first plants noticed was an unknown Apocynum. It 

 was CQmpared with material in the great eastern herbaria laht 

 summer, and nothing like it was seen. 



/ Apoeyiinin ciiiereum n. sp. 



Stems several from a thick woody rootstock, 6 dm. high, 

 purplish, finely cinereous, as are also the other parts of the plant, 

 simple below, branched from a little below the middle, the 

 branches somewhat cymose but not symmetrical: leaves ovate- 

 lanceolate, apiculate, the larger ones 6 cm. long, 3.5 cm. wide, 

 dull green above, pale beneath, midvein yellowish, prominent; 

 petioles short, about 3 mm.: cymes short, 3 to 4 cm. long and 

 about as broad: pedicels 2 mm. long, the lanceolate, scarious 

 bractlets at their base about half as long: calyx 2 to 2.5 mm. 

 long, the lobes oblong-lanceolate, acute, 1.5 to 2 mm. long, 

 barely i mm wide at base: corolla pinkish, 5 mm. long, the 

 erect lobes lanceolate, 2 mm. long, 1.5 mm. wide at base: sta- 

 mens 3 mm. long, the yellow lanceolate-acuminate anthers fully 

 2 mm. long, the saggitate-acute basal lobes extending .5 mm on 

 either side of the stout, .5 mm. wide filament: fruit not seen. 



The type, in the herbarium of the Nevada Agricultural 

 Experiment Station, is Heller gj8j, collected August 11, 1908, 

 in the middle canyon of the South Fork of the Humboldt, above 

 Lee post office, Elko county, Nevada, altitude 7200 feet. 



This, in some respects peculiar species, is referable to the 

 cannabinum group on account of its small and narrow flowers, 

 but the leaves and comparatively small size of the plant, with 



