Philadelphus coulteri S. Wats.

Philadelphus coulteri S. Wats. Proc. Am. Acad. 22 : 472. 1887
A shrub 1-3 m. high, with drooping branches ; bark of young twigs grayish or brownish^ strigose, that of the older branches gray, not exfoliating ; buds not enclosed in the bases of the petioles ; petioles about 5 mm. long ; leaf-blades lanceolate, acute at the apex, rounded or acute at the base-, remotely denticulate, thick, hirsute-strigose above, densely white villous-strigose beneath ; flowering branches short, 2-5 cm. long, with 1-3 pairs of leaves and 1-3 very fragrant flowers ; pedicels, hypanthium and calyx white-silky and tomentulose ; sepals lance-ovate, acute, about 8 mm. long ; petals white with a reddish spot at the base, obovate, about 1 cm. long ; upper portion of the ovary and the united styles hairy ; capsule broadly obovate, about 1 cm. long.
Type locality : Zimapan^ Mexico. Distribution : Northern and central Mexico.