TREI-EASE N. AM. RHAMNACE^. 367 



at base, the slightly revolute margin serrulate or denticulate to nearly en- 

 tire; peduncle mostly 4 to 16 mm., and pedicels 2 to 6 mm. long, like the 

 flowers glabrous or puberulent; nutlets large and commonly not attenu- 

 ated at base. — Mem. St. Petersb. Acad. (1828), x. 281; Watson, Index, 

 16S; Sargent, Forest Trees, 40; Mrs. Curran, Proc. Cal. Acad. 2 ser. 

 i. 252. — California and Nevada to southern Colorado and Mexico. — In 

 the broad-leaved form distributed and described by Howell as R. occi- 

 dentalisi from Oregon (list of 1S87, No. 1105), this species appears to 

 range farther northward than usual, and to approach the preceding. 

 Indeed, some herbarium specimens are hard to place. 



Var. lO.MENTELLA, Brew. & Wats. — Rather low and spreading; leaves 

 densely short-tomentose below. — Bot. Calif. (1S76) i. 10; Watson, Index^ 

 168; Sargent, /.c. 41. — /?. iomevtellus, Benth. PI. Ilartweg. (1846), 303. — 

 Southern California, Arizona, and New Mexico. 



Var. rubra. — Twigs slender, more or less reddish, glabrous; leaves 

 narrowly obovate to mostly oblong or lanceolate, usually acute at base, 

 glabrous or pubescent along the midrib below, deciduous; fruit mostly 

 obovoid, and nutlets attenuated below. — R. rubra, Greene, Pittonia (1887), 

 i. 68, 160; Mrs. Curran, under R. Calijornica, I.e. — Eastern slope of the 

 Sierra Nevada, in California. — Considering the variability of R. Califor- 

 nica^ scarcely to be kept up as a distinct species. 



.SAGERETIA, Brongn. — Shrubs with rigidly spreading spiny twigs, 

 mostly obliquely opposite pinnately veined glo.-sy leaves, and very small 

 flowers scattered along slender loosely branched axillary and terminal 

 spikes. — Ann.Sci.Nat. x. 359; Gray, Gen. ii. 175; Benth. & Hook., Gen. 

 i. 379. — About a dozen species, mostly of Asia and Java. 



1. S. MiCHAUXii, Brongn. — Trailing or scrambling; branches finely 

 checked, at length nearly glabrous, twigs somewhat tomentose; leaves 

 commonly inch and a half long, ovate, more or less cordate, acute or 

 acuminate and submucronate, incurved-serrulate ; petiole and veins below, 

 somewhat tomentose ; inflorescence ample and very loose, leafless above, 

 terminating the upper branches, the lower spikes from the axils of foliage 

 leaves ; fruit about S mm. long, nearly or quite sessile. — /. c. (1826) ; Wat- 

 son, Index, 169, and Proc. Amer. Acad. xx. 358. Rhamims minutiflorus, 

 Michx. Fl. (1803) i. 154. — Along the coast. North Carolina to Florida and 

 Alabama. An Arizona specimen (Santa Rita Mts., Prtngle., 1884, No. 50), 

 though in the range of the next, appears rather to belong here. — If the 

 specific name given by Michaux is to be retained, the plant becomes 5. 

 minutiflora (Michaux). 



2. S. Wrightii, Watson. — Spreading shrub 2 to 5 ft. high, slenderer 

 than the last; leaves 6 to 16 mm. long, elliptical to obovate, cuneate, en- 

 tire or serrulate; inflorescence small and inconspicuous, the few axillary 

 spikes seldom exceeding the leaves. — Proc. Am. Acad. (1SS5), xx. 35S. — 

 New Mexico ( Wright) to Texas {Havard) . 



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