Kellogg's Yampah

Perideridia kelloggii (A. Gray) Mathias, Brittonia 2: 244. 1936
Carum Kelloggii A. Gray, Proc. Am. Acad. 7: 344. 1868. Ataenia Kelloggii Greene, Pittonia 1: 274. 1889.
Stout, from a fascicle of fibrous or slightly thickened roots, 7-15 dm. high; leaves deltoid in general outline, excluding the petioles 15-30 cm. long, 1-2-ternate-pinnate, the ultimate divisions linear to lanceolate, entire, 3-12 cm. long, 1-6 mm. broad; petioles 4-7 cm. long, often sheathing throughout; peduncles slender, 5-18 cm. long; involucre of several linear to linearlanceolate, more or less scarious, reflexed bracts, 5-15 mm. long; involucel of several linear to lanceolate, more or less scarious, eventually reflexed bractlets, 2-6 mm. long, often longer than the flowers but shorter than the fruit; rays 10-20, 15-65 mm. long; pedicels 2-6 mm. long; styles divergent, about 0.5 mm. long; stylopodium conic; fruit oblong, 4-5 mm. long, 2-3 mm. broad; oil-tubes solitary in the intervals, 2 on the commissure; seed sulcate under the tubes, the face plane to slightly concave with a commissural ridge.
Type locality: San Jose, Santa Clara County, California, Brewer 832.
Distribution: Sierra Nevada and Coast Ranges of northern and central California (Heller 7535. Jones 29,049).