Ochoco lomatium is acaulescent with globose tuberous roots with an irregularly thickened or elongated and slender upper 2-4 cm portion. Caudices are simple or 2-3 branched with basal leaf sheaths from previous years absent or weathering into a thatch of a few loose fibers or chartaceous scales at the base of the pseudoscape. The stems are absent with 2-4 cm pseudoscapes underground. The basal leaves of Ochoco lomatium are glabrous, glaucous, and thick or somewhat succulent. The primary leaflets are pinnate, with 1-3 secondary leaflet pairs along each rachis with laterals half the central primary in length. The secondary leaves are pinnatifid with 4-7 lobes. Tertiary leaves are absent and ultimate apical lobes obovate or oblong, 2-6 by 2-3.5 mm, with tips subacute, obtuse, or rounded. Lomatium ochocense has no cauline leaves. There are 1-2 inflorescence peduncles that are 4-6 cm and glabrous. No involucral bracts are present beneath the 2-6 rays that are 0.4-1 cm long and glabrous. Lomatium ochocense has 4-8 involucel bractlets that are elliptic or lanceolate, 2-4 by 0.4-1 mm with scarious margins. The umbel lets are 10-15 flowered with pedicels 2-4 mm long. Flowers have yellow petals with yellow or yellowish-white anthers. Ochoco lomatium fruits are elliptic, 5-8 mm long, and glabrous with the body of the fruit 2-3.5 mm wide and thin wings 0.5-1 mm wide.
Overview
- Species Common Name Ochoco lomatium
- Species Scientific Name Lomatium ochocense
- State Listing Status Endangered
