Lomatium tracyi Mathias & Constance

Lomatium tracyi Math. & Const. Bull. Torrey Club 69: 154. 1942.
Plants acaulescent, 1-3.5 dm. high, from a long slender taproot, glabrous to sparsely scaberulous-puberulent; leaves oblong to ovate in general outline, excluding the petioles 4-10 cm. long, ternate, then 1-2-pinnate, the ultimate divisions linear to oblong, acute or obtuse, apiculate, 1-7 mm. long, 0.4-2 mm. broad; petioles 2-5 cm. long, scarious, wholly sheathing; peduncles exceeding the leaves; involucel of oblanceolate to linear, acuminate, often petiolulate, scarious-margined bractlets, about equaling the flowers; rays 4-9, the fertile 1-6, strictly ascending, 0.5-8 cm. long, very unequal, glabrous or scaberulous; pedicels 1-5 mm. long, few fertile, the umbellets 10-15-flowered; flowers yellow; fruit oblong-ovate to oval, 6-10 mm. long, 3-5 mm. broad, usually acute at base and apex, glabrous, the wings thin, much narrower than the body; oil-tubes obscure. Type locality: Serpentine gravel flats, especially under yellow pines, 5000 feet, Grouse Mountain. Humboldt County, California, Tracy 12,895.
Distribution: Mountains of northwestern California, in Humboldt and Trinity counties, to adjacent Oregon, 1500-6400 feet (Tracy 7610, 8869, 6457).

Lomatium tracyi is a species of flowering plant in the carrot family known by the common name Tracy's desertparsley, or Tracy's lomatium. It is native to the mountains of northern California and southern Oregon, where it grows in the forests on the slopes, often on serpentine soils. It is a perennial herb growing up to 35 centimeters tall from a slender taproot. There is generally no stem, the leaves and inflorescence emerging at ground level. The leaf blades are divided and subdivided into a mass of overlapping threadlike to oval segments. The inflorescence is an umbel of yellow flowers.