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mohavea

Habit Herbs, annual.
Stems

erect or ascending, filiform, twining branches absent, densely glandular-villous.

Leaves

cauline, opposite proximally, alternate distally;

petiole present;

blade fleshy, not leathery, margins entire.

Inflorescences

axillary, flowers solitary;

bracts absent.

Pedicels

present;

bracteoles absent.

Flowers

bisexual;

sepals 5, basally connate, calyx bilaterally symmetric, cupulate, lobes lanceolate, adaxial largest;

corolla yellow or white, bilaterally symmetric, bilabiate, tubular, tube base usually gibbous abaxially, not spurred, lobes 5, abaxial 3, adaxial 2, palate partially blocking mouth;

stamens 2, basally adnate to corolla, filaments glabrous or sparsely hairy, pollen sacs 1 per filament;

staminodes 2 or 3, linear, adaxial minute or absent;

ovary 2-locular, placentation axile;

stigma punctiform.

Fruits

capsules, locules equal, dehiscence poricidal.

Seeds

20–50, dark brown to black, oblong, wings present, abaxial, cupulate.

x

= 15.

Mohavea

Distribution
from USDA
sw United States; nw Mexico
[BONAP county map]
Discussion

Species 2 (2 in the flora).

Mohavea is similar to Pseudorontium, which also has asymmetric, winged seeds. Seeds of Mohavea are notched at the proximal end. Plants of the genus can be distinguished from others in Antirrhineae by their relatively large, acute or obtuse corolla lobes, more or less radially symmetric fruits, and two fertile anthers, each with a single pollen sac. R. K. Oyama and D. A. Baum (2004) and M. Fernández-Mazuecos et al. (2013) found evidence that Mohavea nests among species treated in Sairocarpus.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Corollas yellow, 15–20 mm; pedicels 3–5 mm in flower.
M. breviflora
1. Corollas pale yellow to white, 25–35 mm; pedicels 5–6 mm in flower.
M. confertiflora
Source FNA vol. 17, p. 37. Author: Kerry A. Barringer.
Parent taxa Plantaginaceae
Subordinate taxa
M. breviflora, M. confertiflora
Name authority A. Gray: in War Department [U.S.], Pacif. Railr. Rep. 4(5): 122. (1857)
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