264 BOTANY. 



Chiricahua Agency, Arizona, Rothrock. A form common from South- 

 ern Colorado to New Mexico and westward; distinguished from the original 

 J. occidcntalis of Oregon and California by its more squarrose growth, thin- 

 ner branches, and smaller fruit. 



Juniperus pachyphlcea, Toit. Bot. Whipp. in Pac. R. R. Rep. 4, 142; 

 Engelm. I. c. 589. — A middle-sized tree, with spreading head and thick, 

 fissured hark ; branchlets slender ; leaves elongated, often resiniferous on 

 the back, with slightly denticulate margins ; berries large, glaucous, many- 

 seeded. 



An important tree in Western New Mexico (Fort Wingate, Rothrock, 

 number 140, in 1 874) and Northern Arizona ; readily distinguished from 

 all the other species by its bark, which Dr. Rothrock compares with that 

 of the white oak, and others with the bark of pine. 



Juniperus Californica, Carr., var. Utahensis, Engelm. Junip. 588. — 

 More slender than the western type, J. Californica, with thinner branches 

 and smaller, not so strongly fringed leaves, often in twos; smaller, more 

 globose berries; embryo with 5 cotyledons, as in the species. 



Camp Apache, Arizona, Gilbert, Rothrock. 



GNETACE.E. 



/ Ephedra antisyphilitica, C. A. Meyer. — Arizona and New Mexico. 

 Ephedra trifurca, Torr. — Arizona and New Mexico. 



ENDOGENS. 



ORCHIDE^. 



Microstylis Montana. — Bulb 1' in diameter ; stem 6'-15' high, with 

 2-3 broad sheaths at base ; 1-2 oblong-lanceolate, obtuse leaves, tapering 

 below into sheaths ; flowers many, sessile in a narrow spike (which is 2-5' 

 long), yellowish-white, without the ovary 1" long, each one subtended by 

 an oval bract 1" long ; sepals equal or nearly so, oval, rather obtuse ; lip 

 next the axis, somewhat triangular-ovate, conspicuously sagittate at base, 

 but obtuse or occasionally notched at apex ; lateral petals filiform (usually 

 coiled up), somewhat longer than the sepals; column very short, tapering to a 

 point, and with a very minute tooth on either side below ; stigma a small depres- 



