Boerhavia pterocarpa

S. Watson

Proc. Amer. Acad. Arts 17: 376. 1882.

Treatment appears in FNA Volume 4. Treatment on page 24. Mentioned on page 19.

Herbs, annual; taproot tapered, soft or ± woody. Stems procumbent or decumbent to ascending, sparingly branched throughout, 1–4 dm, minutely puberulent with bent hairs throughout. Leaves ± throughout; larger leaves with petiole 3–12 mm, blade rhombic-ovate to ovate or lanceolate, 15–25 × 9–15 mm (distal leaves smaller, proportionately narrower), adaxial surface glabrous or sparsely puberulent, abaxial surface paler than adaxial, glabrous, neither surface punctate, base round to obtuse, margins entire or slightly sinuate, apex acute. Inflorescences terminal or axillary, without sticky internodal bands; peduncle, 1–3 cm, bearing small capitate clusters of flowers. Flowers: pedicel 0.3–0.6 mm; bracts at base of perianth quickly deciduous, lance-acuminate, 0.4–0.7 mm; perianth white to pale pinkish, campanulate distal to constriction, 1–1.5 mm; stamens 2, included or barely exserted. Fruits 2–8 per cluster, pale green to straw colored, broadly obpyramidal, base tapered to stipelike above pedicel, 2.9–3.4 × 2.8–3.2 mm (l/w: 1–1.4), apex truncate, glabrous; ribs 3–4, winglike, smooth; sulci 3–4 times as wide as base of ribs, coarsely transversely rugose, not papillate.


Phenology: Flowering late summer.
Habitat: Sandy loam to clay soils, disturbed areas, occasionally a weed in ornamental beds
Elevation: 700-1200 m

Discussion

Selected References

None.

Lower Taxa

None.

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

... more about "Boerhavia pterocarpa"
puberulent +  and glabrous +
Richard W. Spellenberg +
S. Watson +
glutinous +
symmetric +  and asymmetric +
pale green;straw colored +
deciduous +
tapered +  and stipelike +
unequal +
woody +, leathery +  and fleshy +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
rhombic-ovate;ovate or lanceolate +
9mm;15mm +
deciduous +  and persistent +
distinct +
lance-acuminate +
minute +  and not accrescent +
corollalike +  and petaloid +
Ariz. +  and Mexico (Sonora) +
700-1200 m +
curved +  and straight +
inconspicuous +  and showy +
1 +  and 80 +
chasmogamous +  and bisexual +
2.9mm;3.4mm +
2 (?) +  and 8 (?) +
obpyramidal +, obovoid +, oblong-clavate +, clavate +  and fusiform +
coriaceous +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
Sandy loam to clay soils, disturbed areas, occasionally a weed in ornamental beds +
thyrsiform +, cymose +  and pedunculate +
axillary +  and terminal +
unequal +
(4-)5-lobed +
pubescent +  and glabrous +
sinuate +  and entire +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (?) +  and 0.06 cm0.6 mm <br />6.0e-4 m <br /> (?) +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
campanulate +
constricted +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Flowering late summer. +
Proc. Amer. Acad. Arts +
glandular-pubescent +, glabrous +  and smooth +
3 +  and 4 +
rounded +
thick +  and thin +
fibrous;fleshy +
membranaceous +
ribbed +, 10-ribbed +  and 5-ribbed +
pubescent +, glabrous +  and warty +
wrinkled +
exserted +  and included +
decumbent to ascending +  and procumbent +
erect +, ascending +  and decumbent +
fusiform +  and linear +
filiform +
not papillate +  and rugose +
3-4 times as wide as base +
woody +  and soft +
Boerhavia pterocarpa +
Boerhavia +
species +
umbellate +, subumbellate +, spicate +  and cymose +
capitate +  and subcapitate +
singly +  and racemose +
gland-tipped +
expanded +
pubescent +, glabrous +  and glandular +
fusiform +  and ropelike +