

140 Ex. Doc. No. 41. 



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

 rally contorted aivns, bore into the earth, after they have fallen. 

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

 and retrorse pubescence retains them in the soil. 



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

 undivided, nearly glabrous, glandularly serrate, conspicuously pe- 

 tiolate; flowers in compound corymbs, ' perfect, calyx segme;;its 

 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. Pediceb 

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

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

 tuse, conspicuously imbricated. Stamens about 10; the filaments 

 inserted into a crenulate glandular ring at the summit of the ca^J^ 

 .tube. Ovary ohovate, compressQ.d, with 2 collateral suspen " 



ded 



ovules. 



/' 



titute of the fleshy glands., with which the throat of the calyx-tu" 

 is furnished in that species. , t 



Photinia arbutifolia, Linn. Cordilleras of California. A ^nru 



4-5 feet high. 



LYTHRACE^, 



Lythrum alatunij Pursh. On the Arkansas. 



M 



m 



ONAGRACE^. 



Zanschneria Californica, PresL Valley of the Gila. A shru 

 with bright crimson flowers, resembling those of a fuchsia. 

 CEnothera albicaulis, JfutL Valley of the Del Norte- 

 (E. pinnatifida, JSTutt. Tributaries of the Canadian river. 

 (E. biennis, Lin?i. Valley of the Del Norte. ^ \ V 



Several other undetermined species of QEnothera exist in the c 



lection. 



Gaura coccinea, J^ufL Tributaries of the Canadian. 

 G. parviflora, DougL Valley of the Del Norte. 



n 



-^ 



LOASACE^. 



Mentzelia pumila, JSTutt. Stem whitish, slender, brancriing? ^^ 

 a little roughened abore, smoothish and somewhat shining be 



