Croton pottsii

(Klotzsch) Müller Arg. in A. P. de Candolle and A. L. P. P. de Candolle

Prodr. 15(2): 561. 1866.

Common names: Leatherweed
Basionym: Lasiogyne pottsii Klotzsch in B. Seemann Bot. Voy. Herald, 278. 1853
Treatment appears in FNA Volume 12. Treatment on page 221. Mentioned on page 209.
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Herbs, perennial, 1–6 dm, monoecious or dioecious. Stems several from base, sparsely branched distally, stellate-hairy. Leaves sometimes clustered near inflorescences; stipules rudimentary; petiole 0.5–2 cm, glands absent at apex; blade ovate-oblong, proximal rounder, distal more ovate-elliptic, 1–6 × 1–3 cm, base rounded, margins entire, apex rounded to acute, both surfaces pale to ashy green, softly stellate-hairy. Inflorescences bisexual or unisexual, racemes, 0.5–2.5 cm, staminate and pistillate flowers each (12–) 20–25. Pedicels: staminate 1.5–6 mm, pistillate 1–3.5 mm, ± recurved in fruit. Staminate flowers: sepals (4–) 5, 1–1.5 mm, abaxial surface densely stellate-hairy; petals (4–) 5, oblong-lanceolate, 1–1.3 mm, abaxial surface glabrous except margins villous; stamens 10–15. Pistillate flowers: sepals 5, equal, 1.5–3 mm, margins entire, apex straight to slightly incurved, abaxial surface glabrous except stellate-hairy at apex; petals 0; ovary 3-locular; styles 3, 0.5–4.5 mm, 2-fid to base, terminal segments 6. Capsules 4–6 (–7) × 4–5 mm, smooth; columella apex with 3 sharp projections. Seeds 3.5–4 × 2–2.5 mm, shiny. 2n = 20.

Distribution

V12 898-distribution-map.jpg

Ariz., N.Mex., Tex., n, c Mexico

Discussion

Varieties 2 (2 in the flora).

The affinities of Croton pottsii lie with C. lindheimerianus and C. monanthogynus.

Selected References

None.

Key

1 Stems straight; erect radii of stellate hairs shorter than lateral radii, thus pubescence appearing appressed and smooth; leaf blades 1.6–6 cm; racemes mostly 1.1–2.5 cm; styles 1.1–4.5 mm; capsules 4–6(–7) mm. Croton pottsii var. pottsii
1 Stems somewhat zigzag; erect radii of stellate hairs longer than lateral radii, thus pubescence appearing ± shaggy; leaf blades usually 1–1.4 cm; racemes mostly 0.5–0.9 cm; styles usually 0.5–1 mm; capsules 4 mm. Croton pottsii var. thermophilus

"connate" is not a number. "distinct" is not a number.

... more about "Croton pottsii"
stellate-hairy +  and glabrous +
straight +
rounded;acute +
Benjamin W. van Ee +  and Paul E. Berry +
(Klotzsch) Müller Arg. in A. P. de Candolle and A. L. P. P. de Candolle +
rounded +
Lasiogyne pottsii +
1 cm10 mm <br />0.01 m <br /> (6 cm60 mm <br />0.06 m <br />) +
ovate-elliptic;ovate-oblong +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Leatherweed +
Ariz. +, N.Mex. +, Tex. +, n +  and c Mexico +
pistillate +  and staminate +
subtending +
scale-like +  and stellate +
axillary +  and terminal +
unisexual +  and bisexual +
palmate +  and pinnate +
colorless +  and reddish +
deciduous +, semideciduous +  and persistent +
palmate +  and pinnate +
denticulate +  and crenate +
extrastaminal +
pistillate +  and staminate +
0.1 cm1 mm <br />0.001 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
pale green +  and white +
list;count;distinct +
oblong-lanceolate +
0.1 cm1 mm <br />0.001 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
(1-)3-carpellate +
0.5 cm5 mm <br />0.005 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
lenticular +, globose +, ovoid +, oblong +  and ellipsoid +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
valvate +  and imbricate +
distinct +  and connate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
stellate-hairy +
caducous +, deciduous +  and persistent +
connate +  and distinct +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (?) +  and 0.45 cm4.5 mm <br />0.0045 m <br /> (?) +
pale +  and ashy green +
stellate-hairy +
Croton pottsii +
species +
dioecious +  and monoecious +
14 +, 10 +, 9 +  and 8 +