Zuckia brandegeei var. plummeri

(Stutz & S. C. Sanderson) Dorn

Vasc. Pl. Wyoming, 296. 1988.

Common names: Plummer’s siltbush
Endemic
Basionym: Grayia brandegeei var. plummeri Stutz & S. C. Sanderson Madroño 34: 148, figs. 1c–d, 2g–l. 1987 (as brandegei)
Treatment appears in FNA Volume 4. Treatment on page 305. Mentioned on page 304.

Leaves usually 6–25 mm wide, rarely wider. Fruiting bracteoles 2 (–4) -winged, samaralike; achenes vertical. 2n = 36.


Phenology: Flowering summer.
Habitat: Fine-textured, often saline and seleniferous substrates
Elevation: 1500-2300 m

Discussion

Zuckia brandegeei var. plummeri occurs on the Duchesne River, Uinta, Kaiparowits, Mancos, Entrada, Summerville, and Morrison formations and other fine-textured substrates. This variety was reported by H. C. Stutz et al. (1987) from New Mexico on the basis of chromosome studies, but the herbarium specimens from San Juan County do not show the broad leaves typical of this variety. Indeed, plants assigned to this variety might not constitute a taxon in the typical sense. Rather, they seem to represent a series of highly variable, morphological segregates with the same chromosome number, having arisen independently several times from a basic brandegeei stock. The distribution is mainly at the margins of the species as a whole.

Selected References

None.

Lower Taxa

None.

"dm" is not declared as a valid unit of measurement for this property.No values specified."dm" is not declared as a valid unit of measurement for this property.

2-winged +  and 2(-4)-winged +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
compressed +
1.2mm;2.2mm +
Obtuse (?) +  and Acute (?) +
Stanley L. Welsh +
(Stutz & S. C. Sanderson) Dorn +
slippery +
aromatic +
persistent +
tapering +
Grayia brandegeei var. plummeri +
narrowly oblanceolate-spatulate +  and elliptic ovate obovate or orbiculate +
persistent +  and deciduous +
subtending +
cellular +, 3-winged +, 1-3-veined +  and veinless +
reddish-brown +, black +, brown +  and green +
lacking +  and 2 +
compressed +
Plummer’s siltbush +
Colo. +, N.Mex. +, Utah +  and Wyo. +
1500-2300 m +
pistillate +  and staminate +
unisexual +  and bisexual +
Fine-textured, often saline and seleniferous substrates +
moniliform +
samaralike +  and 2(-4)-winged +
13mm;80mm +
not winged +  and winged +
entire +  and serrate +
lobed +  and entire +
spongy-thickened +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
inferior +, half-inferior +  and superior +
crassinucellate +  and bitegmic +
campylotropous +
1 +  and single +
persistent +  and deciduous +
4(-5)-lobed +
papery +  and chartaceous +
Flowering summer. +
Vasc. Pl. Wyoming, +
pointing +  and ascending +
basal +, median +  and position +
bulbous +  and taprooted +
fusiform +
fleshy +  and fibrous +
tuberculate +
reniform +
cylindric +
4 (?) +  and 5 (?) +
not armed +, not jointed +  and branching +
opposite +  and alternate +
ascending +  and erect +
succulent +
sessile +  and petiolate +
reduced;small +
horizontal +  and vertical +
verrucate +
Atriplex brandegeei +
Zuckia brandegeei var. plummeri +
Zuckia brandegeei +
variety +
deciduous +, evergreen +, perennial +  and annual +
monoecious +  and dioecious +
enlarged +