Flora of North America species comparison

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Tauschia howellii
Tauschia howellii

Howell's tauschia, Howell's umbrellawort
Habit Herbs short-caulescent, green, 5–8 cm, glabrous.
Leaves

1-pinnate or 1-ternate;

petiole 2–3 cm;

blade oblong to ovate, 1.5–3 × 1.5–3 cm;

leaflets (usually penultimate segments) oblong to ovate, 5–18 × 5–15 mm, lobed, margins irregularly mucronate-dentate.
Peduncles

1–3 cm, usually shorter than leaves.
Umbels

rays (0–)3–5, (0–)8–16 mm, unequal, spreading-ascending;

involucel bractlets leaflike, ascending, oblong to ovate, 10–20 mm, much exceeding flowers and fruits, pinnately lobed, margins irregularly mucronate-serrate.
Pedicels

to 5 mm.
Flowers

petals yellow.
Schizocarps

oblong, ellipsoid, or globose;

mericarps 2–4 × 1–2 mm;

ribs filiform;

oil ducts several in intervals, several on commissure.
2n

= 22.

Tauschia howellii
Phenology Flowering Jun–Jul.
Habitat Open granitic gravel, ridge tops, dry Abies, Pinus ponderosa, or mixed evergreen forests.
Elevation 1700–2500 m. [5600–8200 ft.]
Distribution
from FNA
CA; OR
[WildflowerSearch map]
[BONAP county map]
Discussion

Tauschia howellii has umbels sessile or nearly so in the axils of leaves. Bractlets are similar to the foliage leaves in size and shape. It is known only from the Salmon Mountains in the Klamath Ranges of Siskiyou County, California, and Jackson County, Oregon.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 13.
Parent taxa Apiaceae > Tauschia
Sibling taxa
T. arguta, T. glauca, T. hartwegii, T. kelloggii, T. parishii, T. stricklandii, T. texana
Synonyms Velaea howellii, Drudeophytum howellii
Name authority (J. M. Coulter & Rose) J. F. Macbride: Contr. Gray Herb. 56: 32. (1918)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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