Anulocaulis leiosolenus

(Torrey) Standley

Contr. U.S. Natl. Herb. 12: 375. 1909.

Illustrated
Basionym: Boerhavia leiosolena Torrey in W. H. Emory, Rep. U.S. Mex. Bound. 2(1): 172. 1859 (as Boerhaavia)
Treatment appears in FNA Volume 4. Treatment on page 29. Mentioned on page 27, 30.

Herbs, stout perennial. Stems 0.5–1.5 m. Leaves: 1–3 pairs near base; petiole 3–7 cm; blade broadly ovate to almost round, 5–15 × 4–19 cm, base cordate, rarely rounded, apex rounded or broadly obtuse, adaxial surface dull green to pale green, abaxial surface grayish green, often very pale, both surfaces glabrous or sparsely villous with fine hairs with pale-brown or blackish pustulate bases. Flowers borne singly or in ill-defined clusters of 2–5 on branches of inflorescence; perianth 25–35 mm, tube greenish bronze, limbs white, pink, or rose-pink, abruptly flared from tube, glabrous or minutely pubescent externally at edge (pubescence most easily seen at tip of mature bud); stamens 3, exserted 25–40 mm. Fruits biturbinate, 4.2–8 × 2.6–4.6 mm, secreting mucilage when wetted; ribs 10, narrow, undulate; equatorial flange well developed, sinuate.

Discussion

Varieties 4 (4 in the flora).

Anulocaulis leiosolenus occurs as isolated, islandlike populations that are homogeneous within but differ slightly between populations. The turbinate fruits with prominent ribs and equatorial flange ridge, and the long-tubular perianths, are unifying features. Pubescence, when present, is inconspicuous on the perianth, and is best seen on tips of mature buds.

Selected References

None.

Key

1 Leaf blades glabrous, smooth, pale and blue-green; flower bud glabrous externally at apex Anulocaulis leiosolenus var. gypsogenus
1 Leaf blades at least sparsely beset with hairs with pustulate bases, pale grayish green or green; flower bud minutely puberulent or glabrous at apex > 2
2 Flower bud glabrous at apex; leaf blades dull green Anulocaulis leiosolenus var. leiosolenus
2 Flower bud minutely pubescent at apex; leaf blades pale grayish green to green > 3
3 Leaf blades ± pale grayish green; pustulate-based hairs on leaves sparse; perianth deep rose-pink Anulocaulis leiosolenus var. howardii
3 Leaf blades green; pustulate-based hairs on leaves dense; perianth pale pink to pink Anulocaulis leiosolenus var. lasianthus

"fine" is not a number."thick" is not a number.

... more about "Anulocaulis leiosolenus"
pale +  and grayish green +
green +  and pale green +
wrinkled +  and smooth +
coriaceous +
Richard W. Spellenberg +
(Torrey) Standley +
glutinous +
blackish;pale-brown +
pustulate +
rounded +  and cordate +
unequal +
woody +, leathery +  and fleshy +
Boerhavia leiosolena +
5 cm50 mm <br />0.05 m <br /> (15 cm150 mm <br />0.15 m <br />) +
round;ovate to almost;ovate +
? (?) +  and ? (?) +
4cm;19cm +
opaque +  and dark +
persistent +
distinct +
lanceolate +
minute +  and not accrescent +
corollalike +  and petaloid +
Ariz. +, N.Mex. +, Nev. +  and Tex. +
curved +  and straight +
in ill-defined clusters +  and singly +
inconspicuous +  and showy +
2 +  and 5 +
chasmogamous +  and bisexual +
4.2mm;8mm +
biturbinate +
constricted +
0.26 cm2.6 mm <br />0.0026 m <br /> (0.46 cm4.6 mm <br />0.0046 m <br />) +
lateral +  and terminal +
rose-pink +, pink +  and white +
pubescent +  and glabrous +
pubescent +  and glabrous +
sinuate +  and entire +
tubular-funnelform +
constricted +
2.5 cm25 mm <br />0.025 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
3 cm30 mm <br />0.03 m <br /> (7 cm70 mm <br />0.07 m <br />) +
Contr. U.S. Natl. Herb. +
undulate +
glandular-puberulent +
thick +  and thin +
fibrous;fleshy +
membranaceous +
ribbed +, 10-ribbed +  and 5-ribbed +
pubescent +, glabrous +  and warty +
wrinkled +
Illustrated +
erect +  and ascending +
50 cm500 mm <br />0.5 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
fusiform +  and linear +
filiform +
villous +  and glabrous +
Anulocaulis leiosolenus +
Anulocaulis +
species +
gland-tipped +
greenish bronze +
abruptly flared;5-lobed +
pubescent +  and glabrate +