APPENDIX D. BOTANY. 



3S7 



a flower-bud. Fig. 5, a flower laid open. Fig. 6, a petal. Fig. 

 7, plan of the flower. Fig. 8, a pistil. Fig. 9, front view of the 

 style and stigma. Fig. 10, side view of the same. Fig. 11, a 

 carpel of the natural size. Fig. 12, the same magnified. Fig. 13, 

 a stamen seen in front. Fig. 14, the same seen from behind. 

 Fig. 15, longitudinal section of a ripe carpel, showing the erect 

 seed. Fig. 16, transverse section of the same. All the figures 

 except No. 1 are more or less magnified. 



Spirea dumosa, Nutt. Mss.; Hook. Lond. Jour. Bot. 6, p. 217; 

 Gray, PL Fendl. p. 40. S. discolor, Torr. in Ann. Lye. N. York, 

 2, p. 195; not of Pursh.— Stansbury's Island, Salt Lake. Fl. 

 June 26. 



Plate IV. Spiraea dumosa; a branch of the natural size. Fig. 

 1, the fructiferous calyx. Fig. 2, a carpel. Fig. 3, the same 

 laid open. 



S. opulifolia, var. pauciflora, Torr. and* Gr. Fl. 1, p. 414. — 

 Summit of a mountain on Stansbury's Island, Salt Lake. Fl. June 

 26. A tall, much branched shrub, with leaves scarcely more than 

 half an inch in diameter. 



Oenothera cespitosa, Nutt. — Shore and islands of the Salt 

 Lake. May and June. Usually acaulescent, but sometimes throw- 

 ing up a branching stem about six inches high. The flower is 

 from two to three inches in diameter, white and fragrant. CE. 

 montana, of Nuttall, is hardly distinct from this species, and 

 perhaps CE. marginata should be regarded as a variety of the 

 same. 



CE. scapoidea, Nutt. in Torr. and Gr. Fl. 1, p. 506.— Western 

 shore of the Salt Lake. Fl. and fr. May. 



CE. albicaulis, Nutt.; Torr. and Gr. Fl. p. 495.— Islands of 

 the Salt Lake. Fl. June. Stem about a foot high; the flowers 

 small, white, and inodorous. 



Gayophytum ramosissimum, Torr. and Gr. Fl. 1, p. 513. — 

 Antelope Island, Salt Lake. Stem about eighteen inches high, 

 with very slender branches, and flowers even smaller than in Mr. 

 Nuttall's specimen of this plant. The pedicles are about twice as 

 long as the ripe pod. 



Mentzelia ornata, Torr. and Gr., and Gray, PI. Fendl. p. 47. 

 Bartonia ornata, Nutt.— Islands of the Salt Lake. In our speci- 



