400 CELASTRACE.E. Schceferla. 



S. cuneifolia, Orat. Shmb, with rigid somewhat spiny gray twigs : leaves spatulate- 

 cuueate, rciuiKleil or eniargiuate at apex, half iuch long : pedicels a Hue lung or less : drupe 

 flattened and grooved: otherwise resembling the last. — PI. Wright, i. 35, ii. 29; Torr. But. 

 Mex. Bound. 47 ; Trelease, 1. c. 356. — New Mexico and W. Texas. (Mex.) 



8. MORTONIA, Gray. (Named for Dr. S. G. Morton, an American 

 naturalist of the first half of the present century.) — Mostly intricately branched 

 shrubs with subterete often hispid twigs, very thick alternate small entire 1-nerved 

 revolute leaves with abortive stipules, and small cymes in the upper axils mostly 

 aggregated into a small terminal panicle. — PI. Wright, i. 34, ii. 28; Bentli. &, 

 Hook. Gen. i. 368 ; Trelease, Trans. St. Louis Acad. v. 356 ; Losener in Engl. 

 & Prantl, Nat. Pflanzenf. iii. Ab. 5, 218. — Of the Texano-Mexican region. 



* Leaves elliptical, short. 



M. sempervirens, Gkay. Leaves obtuse to subacute, entire, revolute, glabrous, smooth, 

 2 tu 3 lines lung, very short-petioled : peduncles a line or two loug, with 2 obtuse bracts 

 clo.se to the flower : fruit oblong, 3 Hues long, abruptly beaked. — PI. Wright, i. 35, t. 4, ii. 

 28; Torr. Bot. Mex. Bound. 47; Trelea.se, 1. c. — W. Texas, Wricjht, Biijeiow. 



M. SCabrella, Gray. Divaricately branched : twigs hispidulous : leaves obtuse to stout- 

 pointed, papillate-roughened, about 3 lines long: otherwise like the last. — PI. Wright, ii. 

 28 ; Torr. Bot. Mex. Bound. 47 ; Trelease, 1. c. ; Losener in Engl. & Prantl, Nat. Pflanzenf. 

 iii. Ab. 5, 218, f. 127. — Arizona to S. W. Texas, along the Mexican line. A rather large 

 form, with large flower-clusters and leaves half inch long, is var. Utahensis, Coville, in herb., 

 from Utah and Nevada. 



* * Leaves oblong-spatulate. 



M. Greggii, Gray. Twigs puberulent: leaves mucronate or acuminate, glabrous, minutely 

 punctate, half inch to inch long and 2 lines wide, tapering to a short petiole : fruit shorter, 

 stout. — PI. Wright, i. 35 ; Torr. Bot. Mex. Bound. 47 ; Wats. Proc. Am. Acad. xvii. 336 ; 

 Trelease, I.e. — Northern Mexico, perhaps extending into the United States. M. effusn, 

 Turcz. Bull. Soc. Nat. Mosc. xxxi. 453, based on Berlandier's collections, if separable, differs 

 in its thinner and rather broader less revolute leaves. The other Mexican species, M. 

 Palmeri, Hemsl. Diagn. PI. Nov. pars alt. 24, frequently confounded with M. Gregqii, if 

 really separable, differs in its narrower leaves, which are half inch long, a line wide, very 

 thick, and more revolute. 



9. GLOSSOPETALON, Gray. (Name from yX«o-o-a, tongue, and 

 TreVaXov, petal, because of the shape of these members.) — Small shrubs with 

 angled green nearly or quite glabrous often spinescent twigs, small entire alter- 

 nate leaves with setaceous stipules adnate to the dilated often red or purple base 

 of the petioles, and subsolitary axillary flowers shorter than the leaves. — PI. 

 Wright, ii. 29, t. 12, f. B; Baill. Hist. PI. vi. 42. Glossopetalum, Benth. & 

 Hook. Gen. i. 368 ; Losener in Engl. & Prantl, Nat. Pflanzenf. iii. Ab. 5, 219 ; 

 not Schreber. Forsellesia, Greene, Erythea, i. 206. — Of the Western Moun- 

 tain region. 



G. spinescens, Gray. Low intricately branched .spinescent shrub : leaves glaucous, gla- 

 brous to i)uberulent, oblanceolate, tapering to a petiole about 1 line long that is gradually 

 dilated below and often with minute setaceous adnate stipules, acute, 3 or 4 lines long, and 

 about a line wide : pedicels equalling the leaves : flowers mostly .5-rherous: stamens 10: 

 fruit ovoid, usually curved to one side, acute, finely striate.— PI. Wright, ii. 29, t. 12, f. B, 

 PI. Thurb. 299, & Proc. Am. Acad. xi. 73 ; Torr. Bot. Mex. Bound. 47, & Pac. R. Rep. iv. 74 ; 

 Brew. & Wats. Bot. Calif, i. 109 ; L(isener, 1. c. 219, f. 128. FoisrUfala spinr.trrris, Greene-, 

 1. c. 206. — Snake River, Oregon, Cusic/c, to W. Texas, and the Mojave Desert, California, 

 Parish. 



