' 



178 BOTANY OF THE DEATH VALLEY EXPEDITION. 



The species is most nearly related to B. erioxh-na of Torrey, but differs from that 

 species, among other characters, in the much narrower throat of the calyx, and fruit 

 with rounded apex, that species having au almost rotate calyx-throat, and turbinate, 

 truncate fruit. The, two species agree in the viscidity of the middle part of their 

 internodes. 



The plant was first seen January 20, 1891, as wo descended Long Valley, on the 

 morning of our entrance into Death Valley. The few specimens growing there had 

 put out a few large, radical leaves, but had not yet flowered. In this condition the 

 appearance of the plant strongly suggests a begonia. It was next met with in a 

 canon on the west slope of the Funeral Mountains, opposite Bennett Wells, and 

 again, January 27, in Furnace Creek Canon, where it was collected later in the sea- 

 eon (No. 577). It was seen afterwards in but one locality, on the steep mesa be- 

 tween Hot Springs, in Panamint Valley, and the mouth of Surprise Canon. 



Selinocarpus diffusus Gray. Amer. Journ. Sci. ser. 2. xv. 262 (1853). Type locality, 

 "rocky hills and valleys from the Pecos to the Limpio." 



Collected at Overton, Nevada (No. 1032). In our plant, as in a portion of the type 

 specimen, all the calyces have remained undeveloped with a length of only 2 or 3 mm., 

 while the normal length of a fully developed calyx is about 30mm. Notingthis pecu- 

 liarity, Dr. Gray wrote, with the original description, "The unopened perigonium 

 of the precociously fructified flowers, which usually persists until the fruit is ripe, 

 does not exceed a line in length; while the fully developed flowers are an inch and a 

 half long." 



Abronia fragrans Nutt. loc. indet. 



At Cottonwood Springs, Vegas Valley (No. 1880). 



Abronia nana Wats. Proc. Amer. Acad. xiv. 2'J4 (1879). Type locality, "near 

 Beaver City, S. Utah, in dry ravines among junipers." 



In the Inyo Mountains (No. 1782). This plant has the low, cespitose habit, branched 

 caudex, and other characters of this species, but the bracts of the involucre are some- 

 what smaller. The lack of fruit in both this and the type specimen renders the iden- 

 tification uncertain. 



Abronia pogonantha Hoimerl in Engler, Bot. Jahrb. xi. 87 (1890). Type locality, 

 "in California australi 'sandy banks of the Mojave River/" 



In addition to the type specimens (No. 345, Parish Brothers, 1882) the plant was 

 collected in the same locality in 1881 (No. 1150, Parish Brothers) and has been since 

 found in the Mohave Desert by S. B. Parish (No. 1916 of 1887), in Antelope Valley, 

 by J, C. Oliver (specimen in the Gray herbarium), and now in the Tulare Plains 

 near Bakerslield (No. 1239 of the present collection). 



Abronia turbinata Wats. Bot. King Surv. 285 (1871)— Torr. in herb. Type lo- 

 cality not specifically given; range, "from New Mexico and Arizona to southern 

 California (?) and Nevada." 



Near Keeler (No. 845), and near Crystal Spring, in the Coso Mountains (No. 939). 

 These specimens differ from the typical plant in their smaller, wingless fruit, short, 

 ovate involucral bracts, and broadly obtuse leaves. 



Abronia villosa Wats. Amer. Nat. vii. 302 (1873). Type locality, "Arizona." 

 This plant was collected near Saratoga Springs (Xos. 250, 251) and in the Vegas 

 Wash (No. 425), growing in dry, loose sand. 



