NYCTAGINEA. 7 
1 poll. longi; perianthium infundibulare, tubo angusto, elongato; stamina 5, longe exserta. 
Fructus 5-alatus, vel abortu 2—3-alatus, alis 2-3 lineas latis. 
Nortr Mexico, San Lorenzo de Laguna, Coahuila (Palmer, 1118). Hb. Kew. 
EXPLANATION OF TAB. LXX. 
Fig. 1, a leaf; 2, a flower; 3, a flower with the perianth laid open, showing the insertion of the 
stamens ; 4, upper part of a stamen ; 5, upper part of style with stigma; 6, a fruit: all enlarged. 
9. OKENTA, 
Okenia, Cham. et Schl. in Linnea, v. p. 92; Benth. et Hook. Gen. Plant. iii. p. 6. 
An herbaceous monotype. 
1. Okenia hypogza, Cham. et Schl. in Linnea, v. p. 92. 
‘Sout Mexico, sand dunes, Vera Cruz (Schiede & Deppe), sand dunes on the Pacific 
coast, Oaxaca (Galeotti, 7148), Bolaiios (Coulter, 1426), Zimapan, at 6500 feet (Galeotti, 
7211). Hb. Kew. 
10. ABRONIA. 
Abronia, Juss. Gen. Plant. p. 448; Benth. et Hook. Gen. Plant. i. p. 7. 
A genus of about ten herbaceous species, inhabiting North Mexico, Texas to Cali- 
fornia, and northward to the Columbia River. Several of the species are close upon, if 
not actually within, our northern boundary. 
1. Abronia cycloptera, A. Gr. in Am. Journ. Sc. ser. 2, xv. p. 319. 
Abronia (Tripterocalyx) micrantha, Torr. in Fremont’s Ist Rep. p. 96. 
Texas.—NortH Mexico, along the Rio Grande, from San Elceario to Dofia Afia 
(Wright, 1712). Hb. Kew. 
2. Abronia fragrans, Nutt. in Hook. Kew Journ. Bot. v. p. 261; Torr. & A. Gr. 
Bot. Beckwith’s Rep. p. 14, t. 10; Bot. Mag. t, 5544; Torr. Bot. U.S. & Mex. Bound. 
Surv. p. 170. 
Conumpia River, southward through Uran to New Mexico and Trexas.—Norru 
Mexico, Chihuahua (ex Torrey). 
[A. mellifera, Doug]. in Bot. Mag. t. 2879, is recorded from El Paso and westward, 
and northward to Oregon. | | 
3. Abronia turbinata, Torrey, ex S. Wats. in Bot. King’s Exped. p. 285, t. 31; 
Bot. Calif. ii. p. 5. 
Cairornia to Arizona and Trxas.—Norru Mexico, Gila valley (Rothrock). 
11. BOLDOA. 
KR Boldoa, Cav. Cat. Hort. Madr. 1803, ex Choisy in DC. Prodr. xiii. 2, p. 438; Benth. et Hook. Gen. 
_ Plant. iii. p. 8. 
| _ Repent, Humb. et Bonpl. Pl. Aiquin. i. p. 154, t. 44. 
_ Bentham and Hooker referred two species to this genus, one of which we have 
