78 EEYTHEA. 



but very thin-barked tree, which is larger in all its parts and 

 which inhabits sub-alpine regions to the southward of the present 

 species. 



Tsuga Hookeriana Carriere.* 



Small alpine trees, abruptly spire-shaped or depressed, seldom 

 exceeding 30 feet in height and a diameter of 10 to 15 inches; 

 branches erect or spreading; branchlets usually erect, but often 

 spreading; cones produced at the ends of the branchlets in the 

 same direction, on short, stout peduncles, hence not always pendant 

 narrowly elliptical, 1^-2 inches long, purple until mature, then 

 light brown ; cone scales firm, convex, obovate, striated externally, 

 expanded but not reflexed at maturity ; bracts dark brown, shining, 

 broadly ovate, denticulate above, and acute; seeds brown, 2^ — 3 

 millimeters long, bearing resin vesicles on the lower surface; 

 wing, including the part inclosing the seed, elliptical, 5-7 milli- 

 meters long, concave, light yellow, translucent, not veined with 

 brown lines; leaves 2-3 centimeters long, not distichous but nearly 

 tufted, mostly on the ends of short spurs, dark green with lines 

 of stomata on both sides, convex on lower side, keeled on the 

 upper; resin duct solitary dorsal and large; male flowers in a 

 globose head, exserted on a filiform stipe 4-6 millimeters long, 

 from a small bud; anthers apiculate, pollen bilobed. 



Highest peaks of Alaska and British Columbia, southward along 

 the Cascade Range and Rocky Mountains to Washington and 

 Montana. Gorman, Piper, Johnson, Lloyd, Van Trump, Lemmon 

 and others. 



This interesting Alpine Hemlock is particularly distinguished 

 by its very small size, the strictly alpine habitat, rounded or 

 prostrate form, and its mostly erect branchlets and cones, the 

 latter small, the scales not reflexed at maturity, the small leaves 

 mostly in tufts, — all these characters strengthening the position 

 once taken by the writer, separating these peculiar western spruces 

 from the Hemlocks under the name of Hesperopeuce.'f If that 



* Tsuga Pattoniana, variety Hookeriana Lemmon. Hand-book of 

 West-American Cone-bearers, 54, 1895. 



t Lemmon, in 3d Bien. Kep. Cal. State. Bd. Forestry, 111-126, 1890. 



