170 REPORT OF AN EXPEDITION DOWN THE 



This species is remarkable for its very abundant, small, lentiform, fruits (about 

 two lines in diameter,) which completely cover the paniculate spreading branches. 

 The leaves are from half an inch to nearly an inch long. 



Corispermurn liyssopifolium, Linn.; Pursh, El. 1, p. 8 ; Moq. in D. C. Prodr. 13, 

 (pars post.) p. 140. C. liyssopifolium, 0. Americanum, Nutt. Gen. 1, p. 4. On 

 the Zuni ; September. 



t/lcanthochiton : gen. nov. Floresdioci, heteromorphi. Mas. Perigonium ebrac- 

 teatum? Vel 1-2 bracteatum, 5-sepalum ; sepalis jequolibus erectis. Stamina 5 ; 

 filamentafiliformia; antherae oblongaBbiloculares. Fern. Perigonium 1-2 phyllum 

 vel nullum. Stamina 0. Ovarium ovatum compressiusculum ; styli 2-4, filformes 

 intus stigmatosi. Utriculus ovato-ellipticus, membranaceus, subcompressus, 

 apterus circumscisse dehiscens. Semen verticale, compressum ; albumen cen : 

 trale, farinaceum. Embryo annularis ; radicula infera. Herba annua glabrius- 

 cula. Folia lanceolate, integra. Flores axillares, sessiles ; masculi glomerati ; 

 fccminei glomerato-spicati, foliorum bractealium cordato-falciformium spinescen- 

 tium basi reconditi. 



Ji. Wrighlii. Near the puebla of Zuni, and on the Little Colorado ; September. 

 Plant about a foot high ; the female much more branching than the male ; nearly 

 glabrous. Leaves narrowly lanceolate, a little undulate, or sometimes crenulate, 

 on the margin*: acute, and usually tipped with short mucro, tapering at the base 

 into a petiole ; penninerved, the nerves prominent underneath. Staminate flowers 

 in small roundish clusters in the axils of all the leaves, from the middle of the 

 stem to the summit, giving the appearance of a leafy interrupted spike. Perianth 

 sometimes apparently naked at the base, but often with one or two bractioles ; 

 leaflets lanceolate, very acute. Stamens shorter than the perianth. Flowers in 

 the pistillate plant also in numerous axillary clusters, or rather short spikes. 

 Bracts broadly cordate-falcate, coriaceous, squarrose, recticulately veined, crenu- 

 late on the margin, tipped with a sharp and somewhat rigid point, each enclosing 

 and concealing a single flower. Perianth consisting of one or two lanceolate or 

 spatulate scales — sometimes wanting. No traces of stamens. Ovary glabrous 

 and even, with a single ovule ; styles usually three or four, seldom two. Utricle 

 opening transversely a little above the middle. Seed dark brown. Embryo 

 slender, forming a nearly complete circle. 



This plant was first detected in Western Texas, in 1849, by Mr. Wright ; it has 

 much the habit of Jlgriophyllum, but differs in being dioecious, and in the even, 

 circumscissile utricle. It is an anomalous Chenopodiacca, and might, perhaps, be 

 referred to Amarunthacew. 



SAURURACEiE. 



Jlnemiopsis Californica, Nutt. in Ann. Nat. Hist., 1, p. 136 ; Hook, and Am. 

 Bot. Beech., p. 390, t. 92. Valley of the Rio Grande, a few miles below Dofia 

 Ana ; July. 



