Selenia grandis

R. F. Martin

Rhodora 40: 183. 1938.

Endemic
Synonyms: Selenia oinosepala Steyermark
Treatment appears in FNA Volume 7. Treatment on page 508. Mentioned on page 506, 507.

Plants winter-annuals. Stems erect to ascending, (slender or stout), 1.5–6.5 dm. Basal leaves (soon withered), early rosulate; petiole 1–4 cm; blade margins 2-pinnatisect or 3-pinnatisect, 4–15 cm; lobes 8–16 on each side; apical segment oblong to ovate, 1–10 (–12) × 0.5–2 (–3.5) mm, margins entire. Cauline leaves (and bracts) similar to basal, smaller distally (lobes fewer). Fruiting pedicels: some from basal rosette (straight or slightly recurved), (30–) 50–100 (–180) mm. Flowers: sepals (persistent), erect, oblong-lanceolate, 9–12 (–15) × 2–3.5 mm, apex appendage well-developed, (1–) 2–4 mm; petals broadly obovate, 12–15 (–20) × (5–) 7–11 mm, apex rounded; median filament pairs 4–6 mm, slightly dilated basally; anthers linear, 3–4 mm; gynophore usually obsolete, rarely to 2 mm. Fruits oblong, somewhat inflated, (0.8–) 1–2 (–2.5) cm × 5.5–7.5 mm, (fleshy green, thick, leathery), base and apex obtuse to subacute; valves (covered with well-developed vesicles), not veined; replum rounded; septum complete; ovules 16–44 per ovary; style 2–5 (–7) mm, not flattened basally. Seeds 4–5 mm diam.; wing 1–1.5 mm. 2n = 24.


Phenology: Flowering Dec–Mar.
Habitat: Open grounds, fields, flood plains, roadsides, slightly saline alluvial silt, ditch banks
Elevation: 0-100 m

Discussion

Selenia grandis, which is restricted to the lower valley of the Rio Grande, is easily distinguished from other species of the genus by the presence of vesicles on fruits and by the persistent sepals.

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.

... more about "Selenia grandis"
oblong +, ovate +  and linear +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
obtuse +  and subacute +
1 cm10 mm <br />0.01 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Ihsan A. Al-Shehbaz +
R. F. Martin +
obtuse +  and subacute +
appendaged +  and unappendaged +
3-pinnatisect +  and 2-pinnatisect +
dissected +, repand +, sinuate +, crenate +  and dentate +
4 cm40 mm <br />0.04 m <br /> (15 cm150 mm <br />0.15 m <br />) +
much smaller +  and reduced +
urceolate +, campanulate +  and tubular +
branched +  and simple +
well-developed +
distinct +
differentiated +
emarginate +  and entire +
0-100 m +
straight +  and curved +
not winged +  and unappendaged +
connate +  and distinct +
actinomorphic +
1.2 cm12 mm <br />0.012 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
oblong-lanceolate +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
latiseptate +  and unsegmented +
2 cm20 mm <br />0.02 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
inflated +  and oblong +
0.55 cm5.5 mm <br />0.0055 m <br /> (0.75 cm7.5 mm <br />0.0075 m <br />) +
latiseptate +, stipitate +  and sessile +
inflated +, terete +, obovoid +, globose +, suborbicular +, elliptical +  and oblong +
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Open grounds, fields, flood plains, roadsides, slightly saline alluvial silt, ditch banks +
subsessile +  and petiolate +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
pinnatifid +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
10 cm100 mm <br />0.1 m <br /> (18 cm180 mm <br />0.18 m <br />) +
5 cm50 mm <br />0.05 m <br /> (10 cm100 mm <br />0.1 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
12mm;15mm +
rudimentary +
obovate +
0.7 cm7 mm <br />0.007 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Flowering Dec–Mar. +
trinucleate +  and 3(-11)-colpate +
slender +
mucilaginous +
not +  and mucilaginous +
white +, black +, brown +  and yellow +
orbicular +  and flattened +
persistent +  and caducous +
distinct +
erect +  and spreading or ascending +
reduced +
latiseptate +  and unsegmented +
angustiseptate +, 4-angled +  and terete +
latiseptate +  and unsegmented +
angustiseptate +, 4-angled +  and terete +
tetradynamous +
branched +  and unbranched +
procumbent +  and decumbent +
erect +  and ascending +
2-lobed +, entire +, conical +  and capitate +
subsessile +, sessile +  and petiolate +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
persistent +
distinct +
flattened +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Selenia oinosepala +
Selenia grandis +
species +
scale-like +  and forked +
pubescent +  and glabrous +
anastomosing +
rhizomatous +, taprooted +, scapose +  and not +
perennial +, biennial +  and annual +
subshrub +  and herb +
aquatics +  and terrestrial +
glabrous +  and pubescent +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
13 +, 12 +  and 7 +