- Latin Name: Lomatium triternatum
- Family: Apiaceae
- Common Names: triternate biscuit-root
- Codon: LOMTRI
- Kingdom - Plantae – Plants
- Subkingdom - Tracheobionta – Vascular plants
- Superdivision - Spermatophyta – Seed plants
- Division - Magnoliophyta – Flowering plants
- Class - Magnoliopsida – Dicotyledons
- Subclass - Rosidae
- Order - Apiales
- Family - Apiaceae – Carrot family
- Genus - Lomatium Raf. – desertparsley
- Species - Lomatium triternatum (Pursh) J.M. Coult. & Rose – nineleaf biscuitroot
General: Perennial from an elongate and slightly thickened taproot, 2-8 dm. tall, the stems solitary or few, erect, covered with fine but stiff hairs.
Leaves: Leaves chiefly basal or low-cauline, but usually one or more reduced leaves on the middle or upper stem; leaves ternately or ternate-pinnately 2-3 times cleft into long, narrow or broader segments, 1-10 cm. long, highly variable in this feature.
Flowers: Inflorescence of compound umbels, the rays unequal, 2-10 cm. long at maturity; involucre none, involucel bractlets inconspicuous; calyx teeth none; flowers yellow.
April to July 
Throughout Washington and neighboring states, but more common east of the Cascades 
Dry to somewhat moist open areas, low to mid-elevations. 
An infusion of the leaves and roots has been used in the treatment of chest complaints. An infusion of the flowers and upper leaves has been used in the treatment of colds and sore throats. 
Germination began after 36 days of cold moist treatment. The majority germinated within the first 13 days, but continued sporadically for 67 days. True leaves appeared after 14 days. The seedlings were in the greenhouse for 77 days. Survival was about 53%. 
Seed sample from: 2011
Average Measurement: 9.5 x 3.3 x 1
Measurement Range: L: 7.25 - 12.5, W: 3 - 4, D: 0.5 - 1.5
Shape: Seed a schizocarp, winged, laterally compressed, and ribbed.
Color: On one seed face, there are three white ribs that run across a dark reddish brown surface. On the opposite seed face there is one rib that bisects the dark brown.
Surface: Seeds are matte.
Basic Explanations and Assumptions:
The dimensions for the seeds are length x width x depth. The location of the hilum is used as the base of the seed, and the length is measured from hilum to the opposite apex. Where a style is present, the length is measured from the hilum to the bottom of the style. Width is measured at a right angle to the length at the widest part. Depth is measured at a right angle to the intersection of height and width lines.
Measurements included are the mean average for each measurement of ten separate seeds.
All measurements in millimeters unless otherwise noted.
- Dave Skinner PMC Farm Manager USDA NRCS - Pullman Plant Materials Center Room 211A Hulbert Hall WSU Pullman, Washington 99164-6211 509-335-9689 509-335-2940 email@example.com www.wsu.edu/pmc_nrcs/