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FNA | Family List | FNA Vol. 7 | Cleomaceae

5. Wislizenia Engelmann in F. A. Wislizenus, Mem. Tour N. Mexico. 99. 1848.

Jackass-clover, spectacle-fruit [For Friedrich (later Frederick) Adolph Wislizenus, 1810-1889, botanical collector in southwestern United States and adjacent Mexico]

Gordon C. Tucker

Herbs, shrubs, or subshrubs, annual or perennial. Stems sparsely branched laterally; puberulent, glabrous, or glabrate (scabrid when dry). Leaves: stipules minute tufts of filiform hairs; petiole without pulvinus (equal to or longer than leaflets); leaflets (1 or) 3, (conduplicate). Inflorescences terminal, racemes (dense); bracts usually absent; (pedicels 3-5 mm, glabrous). Flowers: zygomorphic; sepals usually persistent (eventually deciduous), distinct, equal; petals slightly unequal (in pairs); stamens 6 (well-exserted, ± equal); filaments inserted on gynophore, glabrous; anthers (oblong), coiling after dehiscence; gynophore reflexed in fruit; (pistil 2-lobed basally, style filiform, eventually spinelike). Fruits schizocarps, indehiscent, obovate, (reticulate, ± tuberculate, valves disarticulating from persistent, round septum). Seeds 2(-4), globose, not arillate. x = 10.

Species 3 (3 in the flora): sc, sw United States, nw Mexico.

SELECTED REFERENCES Greene, E. L. 1906b. Revision of the genus Wislizenia. Proc. Biol. Soc. Wash. 19: 127-132. Keller, S. 1979. A revision of the genus Wislizenia (Capparidaceae) based on population studies. Brittonia 31: 333-351.

1 Subshrubs or shrubs; leaflets 3 proximally, 1 distally, blade ovate to obovate, 3-8(-12) times as long as wide; sepals ovate.   2 Wislizenia palmeri
+ Annuals; leaflets 3 throughout, blade ovate to obovate, 1.5-4(-5.5) times as long as wide; sepals lanceolate   (2)
2 (1) Leaflets less than 2.8 times as long as wide; gynophore ca. 5 mm in fruit; anthers 1.3-2.5 mm; petals 2.5-5 mm.   1 Wislizenia californica
+ Leaflets 1.5-4(-5.5) times as long as wide; gynophore 2-12 mm in fruit; anthers 0.5-1.7 mm; petals 1.4-4.6 mm.   3 Wislizenia refracta

Lower Taxa


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