Ambrosia salsola

(Torrey & A. Gray) Strother & B. G. Baldwin

Madroño 49: 143. 2002.

Common names: Burrobush
Illustrated
Basionym: Hymenoclea salsola Torrey & A. Gray Mem. Amer. Acad. Arts, n. s. 4: 79. 1849
Treatment appears in FNA Volume 21. Treatment on page 12. Mentioned on page 10.

Shrubs, 20–80 (–150+) cm. Stems erect. Leaves mostly alternate; petioles 0; blades mostly filiform, 15–35 (–65+) × 0.5–1.5 mm, sometimes with 3 (–5+) filiform lobes, abaxial faces sparsely scabrellous, glabrescent, often vernicose, adaxial faces densely scabrellous (white). Pistillate heads ± intermixed with staminates; florets 1. Staminate heads: peduncles 0–0.5 mm; involucres ± cupshaped, 1–3 (–4) mm diam., ± glabrate, ± vernicose or glanddotted; florets 5–15+. Burs: bodies plumply fusiform, 3–4 (–6) mm, stipitate-glandular, wings 5–20+, ± scattered, broadly cuneiform, flabellate, or orbiculate, 3–4 (–6) × 2–4 (–8) mm. 2n = 36.


Phenology: Flowering Mar–May(–Jun).
Habitat: Desert washes, sandy and gravelly benches, lava talus
Elevation: 200–1800 m

Distribution

V21-5-distribution-map.gif

Ariz., Calif., Nev., Utah, Mexico (Baja California), Mexico (Sonora)

Discussion

Variety salsola refers to plants bearing burs with 6–14 wings in 2–3+ cycles, their tips ± spreading to patent; var. pentalepis (Rydberg) Strother & B. G. Baldwin refers to plants bearing burs with 5–9(–13) wings in 1(–2) cycles, their tips ± spreading to patent; var. fasciculata (A. Nelson) Strother & B. G. Baldwin [= Hymenoclea salsola var. patula (A. Nelson) K. M. Peterson & W. W. Payne, an illegitimate name] refers to plants bearing burs with 10–18 wings in 2–3+ cycles, their tips antrorsely ± appressed (see K. M. Peterson and W. W. Payne 1973).

Hybrids between Ambrosia salsola and A. dumosa have been called A. ×platyspina (Seaman) Strother & B. G. Baldwin.

Selected References

None.

Lower Taxa

None.
... more about "Ambrosia salsola"
not tailed +, rounded +  and obtuse +
coherent +  and distinct +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
spiciform +, racemiform +, paniculiform +, glomerate +  and corymbiform +
indeterminate +  and determinate +
John L. Strother +
(Torrey & A. Gray) Strother & B. G. Baldwin +
decurrent +
Hymenoclea salsola +
compound +  and simple +
3.5 cm35 mm <br />0.035 m <br /> (6.5 cm65 mm <br />0.065 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
filiform +
0.5mm;1.5mm +
winged;ribbed;winged;ribbed +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
stipitate-glandular +
tuberculate +  and rugose +
fusiform +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
barbellulate +  and barbellate +
Burrobush +
purplish +  and whitish +
villous +, strigillose +, hispidulous +, glabrous +  and warty +
tuberculate +
globose +  and obovoid pyramidal pyriform obconic or fusiform +
fertile +  and bisexual +
Ariz. +, Calif. +, Nev. +, Utah +, Mexico (Baja California) +  and Mexico (Sonora) +
200–1800 m +
stipitate-glandular +, glabrate +  and hairy +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Desert washes, sandy and gravelly benches, lava talus +
staminate +  and pistillate +
in corymbiform , glomerate , paniculiform , racemiform or spiciform , arrays +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
membranous +  and scarious +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
glanddotted +  and vernicose +
cup-shaped +
conspicuous +
petiolate +  and sessile +
incurved;erect +
filiform +
dentate to pinnatifid or palmatifid +  and entire +
connate +  and distinct +
2-carpellate +
stipitate-glandular +, hirtellous +  and villous +
spatulate;linear +
membranous +
persistent +
0 cm0 mm <br />0 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
Flowering Mar–May(–Jun). +
5 +  and 16 +
unequal +  and subequal +
bearing subulate enations +, hairy +  and bristly +
convex;flat +
exalbuminous +
Illustrated +
prostrate +  and decumbent +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Franseria +  and Hymenoclea +
Ambrosia salsola +
Ambrosia +
species +
campanulate +  and cylindric +
toothed +  and entire +
perennial +  and annual +
10 cm100 mm <br />0.1 m <br /> (400 cm4,000 mm <br />4 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 /> (0.8 cm8 mm <br />0.008 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
5 +  and 20 +
orbiculate +, flabellate +  and cuneiform +
2mm +  and 4mm +