FOUR-O'CLOCK FAMILY 69 



2. Leaves below the flowers united and calyx-like 



a. Stamens 5; involucre bell-shaped; fruit not 



ribbed Mirabilis 



b. Stamens 3; involucre saucer-shaped 



(1) Fruit smooth, not ribbed Allioniella 



(2) Fruit hairy, ribbed or warted Alltonia 



Abronia Jussieu 1774 Abronia 



(Gr. abros, pretty, from the flowers) 



PI. 9, fig. 15-16. 



Sepals 5, united into an elongated, tubular or funnelform calyx, white 



to pink, petals none, stamens 3-5, ovary 1-celled, style slender, fruit dry, 1-5 



winged, with netted veins ; flowers in many-flowered involucres, solitary or 



I clustered on long axillary stalks ; leaves opposite, petioled, thick, entire ; 



annual or perennial. 



1. Flowers white or greenish-white; fruits narrowly 



winged ; perennials 



a. Flowers white, 2-3 cm. long; wings 2-5 A.frdgrans 



b. Flowers greenish, 1.5-2 cm. long; wings most- 



ly 5 A. elliptic a 



2. Flowers pinkish to reddish ; fruits broadly 

 winged ; annuals 



a. Flowers 4-5 mm. wide, 1.5-2 cm. long, red- 

 dish-green A. micrdntha 



b. Flowers 8-10 mm. wide, 3-4 cm. long, pinkish A. cycloptera 



Allionia Loefling 1788 Allionia 



I Named for Allioni, an Italian botanist) 



(Oxybaphus L'Her.) 



PL 8, fig. 1. 



Sepals 5 united into a bell-shaped calyx, corolla-like, rose-purple. 

 ; petals none, stamens 3-5, ovary 1-celled, fruit 1-seeded, club-shaped, 

 I strongly ribbed, fine-hairy; flowers in loose terminal panicles, involucre of 

 1 3-5 partially united bracts, 3-5-flowered, becoming enlarged and net-veined 

 ; after flowering ; leaves opposite. 



1. Tnvolucre 5-lobed : fruit wingless 



a. Stem with long shaggy hairs A. hirsiUa 



b. Stem smooth, at least not shaggy 



(1) Leaves linear to lanceolate A. linearis 



