NYCTAGINACE 4. 19 
3. Okenia Scurep.—Flowers nearly of Mirabilis ; subinfundibuli- 
form limb of perianth regular, 5-fid ; lobes emarginate. Stamens 15- 
18. Fruit clothed with hardened suberous base of calyx, 10- 
costate, closed at apex, finally entering the ground by elongation of 
peduncle after anthesis. Other characters as in A/irabilis.—A pros- 
trate herb; leaves’ glutinous ; flowers solitary terminal, axillary to 
branches usually short ; peduncles much elongated after anthesis ; 
bracts 3, in a short involucre, imbricate under articulate flower 
(Mexico). See p. 5. 
4. Pentacrophys A. Gray.—Flowers nearly of Ofenia; calyx 
regular. Stamens 2. Germen of J/iradilis ; style slender, peltate 
stigmatiferous at apex. Fruit clothed with cylindrical base of calyx, 
5-costate, truncate at apex ; ribs thick suberous Jongitudinal, swell- 
ing to large glands at apex. Other characters as in Miradilis—A 
low herb, lignescent at root, many stemmed, and viscous-pubescent 
scabrid; leaves opposite petiolate; flowers terminal or lateral to leaves; 
bracts below articulate flower, 3 subulate (W. Mezico). See p. 5. 
5. Selinocarpus A. Gray.—Flowers nearly of Okenia; calyx 
subeyathiform or infundibuliform-tubular 5-agonal. Stamens 2-5 
exserted. Germen, fruit and seed of Miradilis; style of Okenia. 
Fruit clothed by accrescent base of calyx produced into 3-5 mem- 
branous-scarious vertical wings.—Low herbs, sometimes suffru- 
tescent, many-stemmed from tuberous or lignescent root; flowers 
terminal or lateral to leaves, 2-nate or many glomerulate; bracts 
below flower 1-3 minute (W. Mexico). See p. 5. 
6. Oxybaphus Vaur.—Calyx very shortly tubular at base ; limb 
4—5-merous, regular or oblique campanulate folded, deciduous. 
Stamens 3, 4, connate at base. Germen of J/irabilis ; style granular- 
capitate at apex. Fruit ovate costate, seed, embryo, albumen of 
Mirabilis —Herbs ; leaves opposite ; flowers in cymes often 1-parous 
and lateral; involucre gamophyllous, 5-fid, 1- or 3-flowered (Ad/io- 
nopsis), sometimes 4, 5-flowered, often marcescent after anthesis 
(Tropical and Subtropical America, Mountainous India). See p. 6. 
7. Allionia L.--- Flowers nearly of Oxybaphus ; regular 4-merous. 
c 2 
