m 



140 



Geum Virginianum, Linn. On the Arkansas. 



Fallugia paradoxa, Endl. gen. 6385, Sieversia paradoxa, Don in 

 Linn., trans. 14, p. 576, t. 22. A remarkable rosaceous shrub, with 

 white flowers, and very long slender plumose tails to the carpels. 

 It differs, in some respects, from Endlicher's character of the genus, 

 but I have not had an opportunity of comparing it with Don's de- 

 scription and figure. It was found in various parts of the valley 

 of the Del Norte. Can it be Geum dryadoides, DC? 



Cercocarpus parvifolius, Nutt. ; Torr,and Gr ',fl.2,p. 427. A 

 shrub about 12 feet high, with numerous straight branches spring- 

 ing from near the ground. The carpels, with their long plumose 

 spirally contorted awns, bore into the earth, after they have fallen. 

 The action of the wind communicates to them a twisting motion, 

 and retorce pubescence retains them in soil. 



Spiraea Californica, n. sp. Shrubby; leaves ovate, lanceolate, 

 undivided nearly glabrous, gladularly serrate, conspicuously pe- 

 tiolate; flowers in compound corymbs, perfect; calyx-segments 

 broad, about as long as the tube; disk coherent with the tube of 

 the calyx; stamens numerous; carpels 5, distinct, 2-valved; seeds 

 2, ascending, the testa expanded at the superior extremity into a 

 membranaceous wing. Grows on high mountains near the Gila. 

 This species is remarkable for its ascending winged seeds, and co- 

 riaceous leaves. It can scarcely be referred to any of the sections 

 into which the genus Spiraea is at present divided. 



Andenostoma FAscicuLATa, Hook and Am. Abundant in the Cor- 

 dilleras of California. A shrub about five feet high. 



A. sparsifolia, n. sp. Leaves scattered, linear-subulate, dotted 

 with glands. Cordilleras of California. A tree 30 feet high with 

 very numerous slender branches. Leaves nearly half an inch long, 

 scarcely half a line wide, somewhat triangular, apparently ever- 

 green. Flowers in small terminal paniculate spikes. Pedicels 

 short, with numerous minute scarious bracts at the base. Calyx 

 turbinate-campanulate, 10-striate, 5-toothed; the teeth ovate, ob- 

 tuse, conspicuously imbricated. Stamens about 10; the filaments 

 inserted into a crenulate glandular ring at the summit of the calyx- 

 tube. Ovary obovate, compressed, with 2 collateral suspended 

 ovules. Very different in appearance from A. fasciculata, and des- 

 titute of the fleshy glands with which the throat of the calyx-tube 

 is furnished in that species. 



Photinia ARBUTiFOLiA,Lii?m. Cordilleras of California. A shrub 

 4 or 5 feet high. 



LYTHRACE^. 



Lythrum alatum, Pursh. On the Aikansas. , 



ONAGRACE.E. 



Zatjschneria Californica, Presl. Valley of the Gila. A shrub 

 with bright crimson flowers, resembling those of a Fuchsia. 

 CEnothera albicaulis, Nutt. Valley of yie Del Norte. 

 (E. pinnatafida, Nutt. Tributaries of the Canadian river. 



