DESCRIPTION OF SPECIES— CONIFERS— ABIETINE^. 79 



and generally enlarged above the middle and gradually narrowed toward 

 the decurring base. We have, however, among the specimens a number 

 of them bearing branches with narrower, nearly linear, closely approached, 

 somewhat longer leaves, as seen in fig. 27, which show a notable deviation 

 of the normal form, the leaves being on a more acute angle of divergence, 

 parallel, and not turned backward. Between this and the normal form, the 

 specimens show intermediate varieties, which recall them all lo the more 

 generally represented type, that of fig. 25. The leaves are seen enlarged 

 in figs. 25 a and 27 a. The cone of this species is not yet known. One 

 of the specimens from Point of Rocks, covered with scattered branchlets 

 and leaves of this Sequoia, has a crushed cone (pi. Ixi, fig. 30), which appears 

 to be a flattened cross-section, or perhaps the flattened base of a strobile 

 turned upward, the broken pedicel marking the central point around which 

 the scales are imbricated from the center to the borders. The scales, as far 

 as they can be discerned, are oblong, cuneate, narrow, emarginate, or irregu- 

 larly crenate along the borders. They rather represent scales of a cone of 

 Glyptostrohus than those of a Sequoia. The relation of this cone is therefore 



uncertain. 



Habitat.— Point of Rocks, Wyoming Territory {Dr. F. V. Hayden, 

 Wm. Cleburn). Nearly one-half of the specimens of the collection of this 

 last contributor represent this species in its various forms. The fine spe- 

 cimen in fig. 25 was kindly communicated by Mr. E. H. Clarke, agent of the 

 Point of Rocks station. 



Sequoin I on g ■ f o lia, Lesqz. 



Plate VII, Figs. 14, 14 a; Plate LXI, Figs. 28,29. 



Sequoia longifolia, Lesqx., Annual Report, 1874, p. 298. 



Branches and branchlets thick ; leaves close, open, slightly recurved or erect, long, linear-lanceo- 

 late, acuminate, slightly narrowed to the decurring base, thick ; scars deep, Ungulate, obtusely pointed, 

 marked by a deep groove in the middle. 



As figured in pi. vii, fig. 14, the leaves arc lanceolate, slightly narrowed 

 to the base, less, however, than represented in the enlarged figure (14 a), 

 gradually acuminate, with a broad, though indistinct middle nerve, and sur- 

 face regularly thinly striate. The specimens in pi. Ixi, figs. 28, 29, have 

 the leaves much longer and narrower, linear, and also gradually narrowed 

 to an acumen; their consistence is still thicker; they are more closely 

 appressed and more numerous, forming by compression a coating of coaly 



