Corispermum welshii

Mosyakin

Novon 5: 348, fig. 1E. 1995.

Common names: Welsh’s bugseed
Treatment appears in FNA Volume 4. Treatment on page 317. Mentioned on page 315, 316.

Plant branched from base or nearly so, 10–35 cm, densely or sparsely covered with dendroid or stellate hairs (rarely with scattered papillae at margins of bracts). Leaf-blades linear-lanceolate or linear, usually plane (or rarely slightly convolute or folded in dried plants), 1–6 × 0.2–0.5 cm. Inflorescences usually compact and dense, rarely ± lax, and condensed only at apex, ovoid, oblong-obovate, or oblong-clavate. Bracts ovate or ovatelanceolate (rarely narrowly ovatelanceolate), 1–3 × 0.3–0.8 cm. Perianth segment 1. Fruits yellowish-brown, light-brown, or brown, usually with reddish-brown spots and whitish warts, strongly to slightly convex abaxially, usually concave adaxially, obovate or orbiculate-obovate, usually broadest slightly beyond middle (occasionally almost near middle), (3.3–) 3.7–4.6 × (2.7–) 3–3.6 mm, slightly shiny or dull; wing translucent, thin, (rarely translucent only at margin, thicker), (0.3–) 0.4–0.6 mm wide, margins entire or irregularly minutely erose-denticulate, apex rounded, truncate, or indistinctly emarginate.


Phenology: Flowering late summer–fall.
Habitat: Sand dunes, sandy shores of creeks and rivers, dry valleys
Elevation: 1300-2200 m

Discussion

The names Corispermum hyssopifolium and C. villosum have been misapplied to C. welshii. Judging from its fruit morphology, C. welshii is closely related to C. americanum, especially to var. rydbergii. Forms intermediate between these taxa occasionally occur, especially in Utah. However, C. welshii differs from C. americanum in having shorter and thicker inflorescences and broader leaves and bracts. Forms similar to C. welshii occur also in other southwestern states, particularly in Colorado and western Texas. These plants are in need of additional study.

Selected References

None.

Lower Taxa

None.

"broadest" is not a number.

... more about "Corispermum welshii"
orbiculate +, elliptic +, obovate +, ovate +, lenticular +, , +, concave +, plane +  and convex to almost +
emarginate +  and truncate +
verrucose +
Sergei L. Mosyakin +
Mosyakin +
slippery +
aromatic +
small whitish +
convolute +, flat +, filiform +, linear +, linear-lanceolate +  and lanceolate +
persistent +  and deciduous +
1 cm10 mm <br />0.01 m <br /> (?) +  and 3 cm30 mm <br />0.03 m <br /> (?) +
ovatelanceolate +  and ovate +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
reddish-brown +, black +, brown +  and green +
Welsh’s bugseed +
Ariz. +, N.Mex. +, Utah +  and Wyo. +
1300-2200 m +
horseshoe--shaped +
symmetric +, or +  and uniseriate +
0.33 cm3.3 mm <br />0.0033 m <br /> (0.37 cm3.7 mm <br />0.0037 m <br />) +
0.27 cm2.7 mm <br />0.0027 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
brown +, light-brown +  and yellowish-brown +
3.7mm;4.6mm +
dull +  and shiny +
orbiculate-obovate +, obovate +, concave +  and convex +
Sand dunes, sandy shores of creeks and rivers, dry valleys +
10 cm100 mm <br />0.1 m <br /> (35 cm350 mm <br />0.35 m <br />) +
oblong-clavate +, oblong-obovate +  and ovoid +
1 cm10 mm <br />0.01 m <br /> (6 cm60 mm <br />0.06 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (?) +  and 0.5 cm5 mm <br />0.005 m <br /> (?) +
wingless +  and winged +
erose-denticulate +  and entire +
0.3 cm3 mm <br />0.003 m <br /> (0.36 cm3.6 mm <br />0.0036 m <br />) +
crassinucellate +  and bitegmic +
campylotropous +
1 +  and single +
persistent +  and deciduous +
nonadherent +  and adherent +
accrescent +
papery +  and chartaceous +
Flowering late summer–fall. +
not accrescent +  and small +
pointing +  and ascending +
basal +, median +  and position +
bulbous +  and taprooted +
fusiform +
fleshy +  and fibrous +
characteristic +
verrucate +  and striate +
rounded +  and flattened +
cylindric +
1 (?) +  and 3 (?) +
not armed +, not jointed +  and branched +
opposite +  and alternate +
ascending +  and erect +
not fleshy +
sessile +  and petiolate +
reduced;small +
horizontal +  and vertical +
verrucate +
Corispermum welshii +
Corispermum +
species +
whitish +  and reddish-brown spots +
polygamous +, dioecious +  and monoecious +
0.4mm;0.6mm +