Mirabilis sect. Oxybaphoides

A. Gray in W. H. Emory

in W. H. Emory, Rep. U.S. Mex. Bound. 2(1): 173. 1859.

Synonyms: Undefined sect. Allioniella Rydberg Undefined sect. Hesperonia Standley
Treatment appears in FNA Volume 4. Treatment on page 46. Mentioned on page 41.

Herbs, herbaceous to suffrutescent or shrubby perennial [annual]; roots cylindric, cordlike. Stems erect to decumbent or prostrate, densely to sparsely leafy, leaves ± evenly distributed. Leaves: basal leaves petiolate, larger; distal leaves short petiolate or sessile, smaller, margins entire. Inflorescences axillary and terminal in open or congested, few or repeatedly branched cymes; involucres slightly accrescent, bell-shaped, with 1 (–3) flowers inserted at base. Flowers: perianth broadly and shortly funnelform, abruptly flared from narrow tube, deeply 5-lobed; stamens 3–5. Fruits with (0–) 5–10 indefinite or prominent lines, ellipsoid or obovoid, round in cross-section, base not or slightly constricted, apex rounded, truncate, or somewhat nipplelike, surface of fruit smooth or very slightly rugose, glabrous, mucilaginous when wetted.

Distribution

sw United States, n Mexico, South America, s Asia

Discussion

Species ca. 17 (3 in the flora).

Mirabilis sect. Oxybaphoides is poorly understood. It is the only section with species native to the Old World. In North America, two genera have been recognized: the monotypic Allionella, and the complex series of intergrading forms in Hesperonia, where P. C. Standley (1918) recognized nine species and A. Heimerl (1934c) referred to the group (in Mirabilis) as a “formenkreis.” Most later botanists have included all taxa in the complex in a broad Mirabilis, variously treating the different morphologic entities as species, infraspecies, or variously combining them into broadly constructed, variable taxa. One species in the section, Mirabilis expansa (Ruiz & Pavon) Standley, has recently been discovered to be an important food crop among indigenous peoples of the Andes (National Research Council 1989b).

"thin" is not a number.

rounded +
Richard W. Spellenberg +
A. Gray in W. H. Emory +
glutinous +
constricted +
woody +, leathery +  and fleshy +
undulate;plane;linear;ovate or more or less round +
persistent +
distinct +, , +  and connate +
corollalike +  and petaloid +
branched +, congested +  and open +
sessile +, petiolate +  and short +
sw United States +, n Mexico +, South America +  and s Asia +
curved +  and straight +
inconspicuous +  and showy +
cleistogamous +, chasmogamous +  and bisexual +
round +, obovoid +  and ellipsoid +
bell--shaped +
accrescent +
herbaceous;papery +
distributed +
prostrate +  and decumbent +
unequal +
5-lobed +
pubescent +  and glabrous +
sinuate +  and entire +
chasmogamous +  and cleistogamous +
5-lobed +  and flared +
constricted +
in W. H. Emory, Rep. U.S. Mex. Bound. +
spellenberg2001a +
not evident +  and defined +
pubescent +  and glabrous +
tuberculate +  and smooth +
globose +, ellipsoid +, obovoid +  and round +
coriaceous +
thick +  and thin +
cordlike +  and cylindric +
fibrous;fleshy +
membranaceous +
ribbed +, 10-ribbed +  and 5-ribbed +
pubescent +, glabrous +  and warty +
wrinkled +
fusiform +  and linear +
filiform +
mucilaginous +
Undefined sect. Allioniella +  and Undefined sect. Hesperonia +
ropelike +  and swollen +
Mirabilis sect. Oxybaphoides +
Mirabilis +
section +
gland-tipped +
expanded +
herb +, shrubby +, herbaceous +  and suffrutescent +
pubescent +  and glabrous +