172 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



New Mexico: Glorieta; Oak Canyon, Folsom. Transition Zone. 



A low shrub, 1 to 3 meters high, with oblong to obovate, sinuate-dentate leaves; 

 acorns small, 10 to 13 mm. long, acute. 



Assuming that Q. undulata is a species with bluish green, persistent leaves, this 

 species resembles it in nearly all particulars except that its leaves are bright chloro- 

 phyll green and probably deciduous. This would make it intermediate between the 

 two groups of the region — the blue green leaved species, which it resembles in habit 

 and shape of leaf, and the green-leaved species, which it resembles in color and tex- 

 ture of leaves and time of shedding them. It might be a hybrid, but the plant was 

 very common about Glorieta, forming numerous clumps of bushes a rod or so in 

 diameter, and Mr. Howell's plant from Folsom is almost a perfect match from a 

 similar region farther east. 



16. Quercus havardii Rydb. Bull. N. Y. Bot. Gard. 2: 213. 1901. 



Shinnery oak. 



Type locality: Sand hills on the Staked Plains, Texas. Type collected by Ha- 

 vard (no. 51). 



Range : Western Texas and eastern New Mexico. 



New Mexico: Roswell; sandhills 35 miles east of Carlsbad. Sand hills, in the 

 Lower Sonoran Zone. 



This is a low shrub, rarely over 70 cm. high, fonning a tolerably thick growth on 

 the sand hills of southeastern New Mexico east of the Pecos Valley. The plant is gen- 

 erally spoken of as "shinnery " or "shin-oak " and the sands it covers go by the name 

 of "shinnery sands." Its leaves are bright green and deciduous, glabrous aboA-e, 

 somewhat paler and velutinous beneath, oblong in form, 6 cm. long or less, coarsely 

 sinuate-lobed or dentate with a few teeth. The acorn is the largest borne by any 

 species in New Mexico, the cup hemispheric, the upper scales slightly or not at all 

 thickened, acuminate, the lower ones somewhat thickened; the acorn 20 mm. long 

 and three-fourths as broad, obtuse. 



17. Quercus venustula Greene, W. Amer. Oaks 2: 69. 1890. 



Type locality: "Mountains of southern Colorado and northern New Mexico; plen- 

 tiful near Trinidad, and also on higher mountains farther southward." 



Range: Southern Colorado and northern New Mexico. 



New Mexico: Cross L Ranch; Santa Fe and Las Vegas mountains; "White Moun- 

 tains. Mountains, in the Transition Zone. 



A low shrub, with deciduous leaves; these small (3 to 4 cm. long), oblong, with a 

 few rounded coarse teeth or lobes, green above, paler and pubescent beneath. The 

 acorns are small, rather numerous, and racemose, the cup hemispheric, 6 or 7 mm. 

 in diameter, covering almost half the acute acorn. Rare in the mountains of the 

 northern part of the State. 



18. Quercus submoUis Rydb. Bull. N. Y. Bot. Gard. 2: 202. 1901. 

 Type locality: Arizona. 



Range: Mountains of eastern Arizona and western New Mexico. 



New Mexico: Carrizo Mountains; south of Gallup; north of Datil; Ramah. 



A low tree or shrub with deciduous green leaves, which are elliptic-obovate in 

 outline, with rounded, mostly two-toothed lobes and rather deep sinuses, the lower 

 surfaces velvety-pubescent. The young twigs are reddish brown; the acorn cup is 

 depressed-hemispheric, with scales scarcely thickened, and the acorn is barrel- 

 shaped and obtuse. 



19. Quercus utahensis (A. DC.) Rydb. Bull. N. Y. Bot. Gard. 2: 202. 1901. 

 Quercus stcllata utahensis A. DC, in DC. Prodr. 16^: 22. 1864. 



Type LOCALrrv: "Inter Salt Lake et Sierra Nevada." 



Range: Mountains of Utah, Colorado, Arizona, and New Mexico. 



