Halimolobos pubens

(A. Gray) Al-Shehbaz & C. D. Bailey

Syst. Bot. 32: 146. 2007.

Basionym: Hymenolobus pubens A. Gray Smithsonian Contr. Knowl. 3(5): 9. 1852
Synonyms: Capsella pubens (A. Gray) S. Watson Mancoa pubens (A. Gray) Rollins Poliophyton pubens (A. Gray) O. E. Schulz
Treatment appears in FNA Volume 7. Treatment on page 559. Mentioned on page 558.

Annuals or biennials; (base not woody). Stems erect, unbranched or branched distally, (2–) 3–7.5 (–11.5) dm, trichomes sessile. Basal leaves: petiole 0.4–2 cm; blade oblanceolate to oblong, 2–8 (–11) cm × 05–20 (–30) mm, margins coarsely dentate or somewhat pinnatifid, surfaces with sessile trichomes. Cauline leaves sessile; blade oblong to oblanceolate, 1.5–5 (–6) cm × 3–12 (–15) mm (smaller distally), base truncate or broadly cuneate, margins coarsely dentate, pubescent as basal. Racemes considerably elongated in fruit. Fruiting pedicels divaricate, (slightly curved upward or straight), (6–) 8–15 (–18) mm, (trichomes appressed). Flowers: sepals widely spreading, 1.5–2.5 × 1–1.5 mm; petals spatulate, 1.5–2.5 × 0.7–1.2 mm, claw obscurely differentiated from blade, to 1 mm; filaments spreading, 1.5–2.5 mm, equal to petals; anthers 0.7–1 mm. Fruits ascending, straight, not torulose, oblong to ovoid, slightly angustiseptate to subterete, 0.5–0.8 (–0.9) cm × 3–4 (–5) mm; ovules (60–) 70–110 per ovary; style 0.3–0.8 (–1) mm. Seeds biseriate, 0.6–0.8 × 0.4–0.5 mm.


Phenology: Flowering late Apr-early Aug.
Habitat: Spring-fed areas, canyons, draws, streamsides, shaded moist grounds, grassy plains, creek beds, tobosa flats
Elevation: 1200-1500 m

Distribution

V7 897-distribution-map.gif

Ariz., Tex., Mexico (Coahuila), Mexico (Sonora)

Discussion

Halimolobos pubens appears to be restricted in Texas to Brewster, Jeff Davis, Presidio, and Reeves counties. It has recently been reported from Cochise County, Arizona. For a detailed discussion of its generic disposition, see C. D. Bailey et al. (2007).

Selected References

None.

Lower Taxa

None.

"elongated" is not a number."thick" is not a number."dm" is not declared as a valid unit of measurement for this property."dm" is not declared as a valid unit of measurement for this property.

... more about "Halimolobos pubens"
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Ihsan A. Al-Shehbaz +  and C. Donovan Bailey +
(A. Gray) Al-Shehbaz & C. D. Bailey +
cuneate +  and truncate +
Hymenolobus pubens +
appendaged +  and unappendaged +
5 cm50 mm <br />0.05 m <br /> (6 cm60 mm <br />0.06 m <br />) +
1.2 cm12 mm <br />0.012 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
not auriculate +
1.5 cm15 mm <br />0.015 m <br /> (5 cm50 mm <br />0.05 m <br />) +
sinuate-dentate +  and dentate +
pinnatifid +  and dentate +
oblong;oblanceolate +
much smaller +  and reduced +
0.3 cm3 mm <br />0.003 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
urceolate +, campanulate +  and tubular +
branched +  and simple +
well-developed +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
differentiated +
emarginate +  and entire +
incumbent +  and accumbent +
Ariz. +, Tex. +, Mexico (Coahuila) +  and Mexico (Sonora) +
1200-1500 m +
straight +  and curved +
not winged +  and unappendaged +
connate +  and distinct +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
zygomorphic +  and actinomorphic +
2-valved +  and capsular +
0.8 cm8 mm <br />0.008 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
straight +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
oblong +  and ovoid slightly angustiseptate +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
ovoid +  and oblong terete or angustiseptate +
ovoid +  and oblong terete or angustiseptate +
Spring-fed areas, canyons, draws, streamsides, shaded moist grounds, grassy plains, creek beds, tobosa flats +
sessile +  and petiolate +
alternate +, not +  and rosulate +
basal +  and cauline +
connate +  and distinct +
decurrent +
pinnatifid +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
1.5mm;2.5mm +
rudimentary +
spatulate +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Flowering late Apr-early Aug. +
trinucleate +  and 3(-11)-colpate +
1.5 cm15 mm <br />0.015 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
slender +
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
mucilaginous +
not +  and mucilaginous +
white +, black +, brown +  and yellow +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
persistent +  and caducous +
distinct +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
reduced +
latiseptate +, schizocarpic +, samaroid +  and lomentaceous +
indehiscent +  and dehiscent +
angustiseptate +, flat +, angled +, terete +, torulose +, not +, segmented +  and nutletlike +
tetradynamous +
branched +  and unbranched +
procumbent +  and decumbent +
2-lobed +, entire +, conical +  and capitate +
subsessile +, sessile +  and petiolate +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
persistent +
distinct +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
Capsella pubens +, Mancoa pubens +  and Poliophyton pubens +
Halimolobos pubens +
Halimolobos +
species +
anastomosing +
biennial +  and annual +
rhizomatous +, taprooted +, scapose +  and not +
perennial +, biennial +  and annual +
subshrub +  and herb +
aquatics +  and terrestrial +
glabrous +  and pubescent +