Corispermum pallidum
Corispermum hookeri
pale bugseed
Hooker bugseed, Hooker's bugseed
blades linear, narrowly linear, occasionally linear-spatulate, rarely almost filiform, flat or occasionally slightly convolute (especially at maturity and in dry plants), 2–5 × 0.1–0.2(–0.3) cm.
blades narrowly lanceolate or linear-lanceolate, plane, 2–5 × (0.1–)0.2–0.5(–0.6) cm.
usually narrowly ovate-lanceolate or lanceolate, (0.5–)1–1.5(–2) × 0.2–0.5 cm.
ovate or ovate-lanceolate, 0.5–1.5(–2) × 0.3–1 cm.
lax or slightly condensed, interrupted only near base, linear.
usually dense, ovoid, ovate-clavate, or ovate-cylindric, rarely interrupted near base.
segment 1.
segment 1.
pale, usually straw-colored or yellowish brown, occasionally with reddish brown spots, flattened or slightly convex abaxially, plane or slightly concave adaxially, rounded-obovate or obovate, distinctly broadest beyond middle (rarely closer to middle), 2.8–3.5(–3.8) × 2.4–2.8(–3.3) mm, slightly shiny or dull;
wing translucent, thin, usually 0.7–1 mm wide, margins erose or irregularly erose-denticulate (rarely almost entire), apex emarginate (notched) or rounded.
usually deep olive green, brown, or rarely to almost black, usually without spots and/or warts, or occasionally spotted, strongly convex abaxially, prominently concave to almost plane adaxially, usually broadest beyond middle, (3.2–)3.5–4.5(–5) × 2.2–3.3(–3.5) mm;
wing (when present) semitranslucent, to 0.2 mm wide, margins entire, apex rounded or indistinctly triangular.
Corispermum pallidum
Corispermum hookeri
Of conservation concern.
The combination of characteristics of Corispermum pallidum is very distinctive: pale, flattened, and small fruit body; very wide (especially as compared to the fruit dimensions), thin, translucent wing with erose margins, long style bases (ca. 0.7–1 mm, including their parts adnate to wing), distinctly divided in their upper parts to below the edge of the wing. Young bracts and distal leaves of C. pallidum are often papillose on margins and veins, in combination with typical branched trichomes. Corispermum pallidum seems to be related to the eastern Asian C. macrocarpum Bunge ex Maximowicz aggregate (subsect. Platyptera Mosyakin).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Varieties 2 (2 in the flora).
The inflorescence bracts of Corispermum hookeri are conspicuously imbricate (usually strongly overlapping). Corispermum hookeri seems to be closely related to the narrow-winged taxa, C. villosum and C. ochotense, and to C. pallasii sensu stricto. The names C. orientale and C. hyssopifolium have been commonly misapplied to this species.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Inflorescences dense throughout, rarely interrupted. Fruits oblong-obovate to obovate | var. hookeri |
1. Inflorescences dense only at apex, interrupted. Fruits elongate to oblong-obovate | var. pseudodeclinatu |
WA
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
BC
