172 UNITED STATES AND MEXICAN BOUNDARY. 
diameter, on very short pedicels. Fruit 14 line long. This seems to be the same as No. 1425 
(which is without leaves) of Coulter’s Mexican Collection ; but B. spicata, as described by Choisy, 
differs in the lanceolate acute leaves and in some other unimportant characters. 
ВоЕвПААУТА SCANDENS, Linn.; Choisy, 1. с. В. Grahami, Gray, 1. с. Dry ravines near the 
Cibola of the Rio Grande, August; Bigelow. El Podrero, Sonora, June; Schott, (No. 3204 
and 3205, Berlandier.) We can discover no essential difference between B. Grahami and our 
West Indian specimens of B. scandens. Indeed, Dr. Gray suspected they were not distinct. 
The free portion of the calyx-tube is as short in the latter as in the former, and neither plant is 
climbing, being only prostrate, or not unfrequently even erect ; so that the specific name is in- 
appropriate. /// ر‎ 
BOERHAAVIA ERIOSOLENA, Gray, 1. с. р. 322. Gravelly plains near Presidio del Norte, and 
below the Great Сайоп of the Rio Grande, September ; Parry, Bigelow. Annual. Plant 1-2 
feet high. Leaves orbicular-cordate, 11-21 inches in diameter. Flowers often precociously 
fructified, and then the somewhat persistent tube becomes more or less elongated, sometimes 
5-8 lines or more ; but the limb, in such cases, does not expand. 
BOERHAAVIA LEIOSOLENA (n. sp.) : perennis ; caule glabro erecto superne nudo ; foliis rotundato- 
cordatis carnosis utrinque elevato-punctatis margine crenato-denticulatis glandulosisque ; pani- 
cule ramis distantibus paucifloris, pedicellis subfasciculatis brevissimis ; bracteis bracteolisque 
minutis; perianthii tubo elongato glabro; fructu turbinato 10-striato ; staminibus 5. In gyp- 
seous soil, Great Cafion of the Rio Grande, 70 miles below El Paso, June; Parry. Stem 2-3 
feet high, arising from a somewhat ligneous root. Leaves 2-3 pairs, near the base of the stem, 
2—3 inches in diameter, roughened on both sides, (at least in dry specimens,) with little elevated 
‘dots or papillz, and the upper surface somewhat flocculose-pubescent, Panicle naked or with 
only a pair of small leaves at the base of the lowest branches. Flowers somewhat fasciculate 
toward the summit of the branchlets. Perianth with the free portion of the tube nearly an inch 
long, the limb ovate but scarcely expanded in any of our specimens; the adherent portion of 
the tube expanded at the summit into an annulate narrow wing. Fruit about 24 lines long, 
turbinate, crowned with a conical summit. This is evidently allied to the last species, and is 8 
very remarkable plant. . 
BoERHAAVIA GIBBOSA, Pavon.; Gray, l. c. p. 323. Tinantia gypsophiloides, Mart. & Gal. ; 
Choisy, l. c. р. 457. Borders of the Rio Grande, from El Paso to the mouth of the Pecos, anl 
south-westward, A pril—October. 
My I Dr. Gray, who has lately revised the North American genera of Nyctaginacew and 
the species of Mirabilis and Oxybaphus, has furnished me with the following conspectus. 
1. MIRABILEJE. Involucrum calyciforme, gamophyllum, 1-12-florum. Stigma capitatum, 
granulatum. 
* Anthocarpium symmetricum, apterum, Involucrum 5-fidum. 
MIRABILIS, Linn. Anthocarpium leeve, hand angulatum, ecostatum aut vix costatum, ovoi- 
deum. Involuerum herbaceum, post ant 
hesin vix mutatum, Stami 1881 
4 : ы mina seepissime 5. 
| E L pel sc aa 5-costatum, obovatum vel clavatum, costis validis. In- 
vo sa post anthesin auctum, rotato-explanatum, scariosum, reticulatum. Stamina sepis- 
sime 3. 5 d 
жж "i Ine m 
Anthocarpium leve, hinc excavatum, marginibus alwformibus rigidis plerumque dentatis 
