Polanisia dodecandra subsp. trachysperma

(Torrey & A. Gray) H. H. Iltis

Rhodora 68: 47. 1966.

Common names: Sandyseed or western clammyweed
Weedy
Basionym: Polanisia trachysperma Torrey & A. Gray Fl. N. Amer. 1: 669. 1840
Treatment appears in FNA Volume 7. Treatment on page 203. Mentioned on page 202.
Revision as of 11:06, 30 July 2020 by imported>Volume Importer
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Leaflets: blade apex acute to obtuse. Inflorescence bracts lanceolate to ovate. Petals white, (7–) 8–13 (–16) mm. Stamens (6–) 12–28 (–40) mm, longest ones ca. 2 or more times as long as petals. Seeds roughened. 2n = 20.


Phenology: Flowering summer–early fall.
Habitat: Gravelly or sandy, sunny places along streams, sandy places, open woodlands, grasslands, roadsides
Elevation: 100-1500(-2100) m

Distribution

V7 263-distribution-map.gif

Alta., Man., Ont., Sask., Ala., Ariz., Ark., Calif., Colo., Conn., Idaho, Ill., Iowa, Kans., Ky., La., Md., Mass., Mich., Minn., Mo., Nebr., Nev., N.Mex., N.Dak., Ohio, Okla., Pa., S.Dak., Tex., Utah, Va., Wash., W.Va., Wyo., Mexico

Discussion

Subspecies trachysperma is found mainly in the Great Plains and western states. Populations in the eastern United States are presumably adventive, as are those in eastern Ontario, where it has been found spreading in disturbed areas, such as quarries and roadsides (B. McBride 2006).

Selected References

None.

Lower Taxa

None.
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
not coiling +
0.1 cm1 mm <br />0.001 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
emarginate +  and lacerate +
Gordon C. Tucker +
(Torrey & A. Gray) H. H. Iltis +
Polanisia trachysperma +
serrulate +, serrate +  and entire +
lanceolate;orbiculate +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
4 cm40 mm <br />0.04 m <br /> (7 cm70 mm <br />0.07 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
Sandyseed or western clammyweed +
Alta. +, Man. +, Ont. +, Sask. +, Ala. +, Ariz. +, Ark. +, Calif. +, Colo. +, Conn. +, Idaho +, Ill. +, Iowa +, Kans. +, Ky. +, La. +, Md. +, Mass. +, Mich. +, Minn. +, Mo. +, Nebr. +, Nev. +, N.Mex. +, N.Dak. +, Ohio +, Okla. +, Pa. +, S.Dak. +, Tex. +, Utah +, Va. +, Wash. +, W.Va. +, Wyo. +  and Mexico +
100-1500(-2100) m +
adnate +  and free +
rotate;crateriform campanulate or urceolate +
dehiscent +  and indehiscent +
elongate +
oblong +  and cylindric +
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Gravelly or sandy, sunny places along streams, sandy places, open woodlands, grasslands, roadsides +
axillary +  and terminal +
arranged +  and alternate +
4.5 cm45 mm <br />0.045 m <br /> (6.5 cm65 mm <br />0.065 m <br />) +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
1.9 cm19 mm <br />0.019 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
1-carpellate +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
2.5 cm25 mm <br />0.025 m <br /> (4 cm40 mm <br />0.04 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
1.3 cm13 mm <br />0.013 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
distinct +
clawed +  and oblong-ovate +
unequal +
0.8 cm8 mm <br />0.008 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
4.5 cm45 mm <br />0.045 m <br /> (6 cm60 mm <br />0.06 m <br />) +
green;purple +
1.5 cm15 mm <br />0.015 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
Flowering summer–early fall. +
tricolporate +  and binucleate +
5 cm50 mm <br />0.05 m <br /> (20 cm200 mm <br />0.2 m <br />) +
not arillate +
dark reddish-brown +
tuberculate-rugose +  and roughened +
globose +  and oblong +
0.2 cm2 mm <br />0.002 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
deciduous +
distinct +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
glandular-pubescent +  and glabrous +
2.8 cm28 mm <br />0.028 m <br /> (4 cm40 mm <br />0.04 m <br />) +
1.2 cm12 mm <br />0.012 m <br /> (2.8 cm28 mm <br />0.028 m <br />) +
spreading +  and erect +
glandular-pubescent +
deciduous +  and caducous +
scale-like +, thread-like +  and 3-8-palmatifid +
deciduous +
0.5 cm5 mm <br />0.005 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
Cristatella +
Polanisia dodecandra subsp. trachysperma +
Polanisia dodecandra +
subspecies +
60 cm600 mm <br />0.6 m <br /> (90 cm900 mm <br />0.9 m <br />) +
perennial +  and annual +
10 cm100 mm <br />0.1 m <br /> (60 cm600 mm <br />0.6 m <br />) +
perennial +  and annual +