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FNA | Family List | FNA Vol. 12 | Rhamnaceae

1. Karwinskia humboldtiana (Schultes) Zuccarini, Abh. Math.-Phys. Cl. Königl. Bayer. Akad. Wiss. 1: 353. 1832.

Coyotillo Coyotillo

Rhamnus humboldtiana Schultes, Syst. Veg. 5: 295. 1819

Shrubs or small trees, 1.5–4(–6) m, glabrous or glabrate. Leaves: petiole 2–10 mm; blade oblong to elliptic-oblong, or elliptic-ovate, (1.5–)3–7(–8) cm, base rounded or truncate to acute, margins entire or weakly crenate (teeth at vein tips), apex rounded or truncate to acute, surfaces glabrous or abaxial surface sparsely puberulent along veins. Inflorescences 1–3-flowered. Drupes black, globose, 9–13 mm.

Flowering (Mar–)Apr–Oct. Limestone ridges and hillsides, roadsides, juniper woodlands, brushlands, mesquite woodlands, sandy clay, sandy loam, deep sand; 10–600(–700) m; Tex.; Mexico.


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