FOUR-O'CLOCK FAMILY. 





i. Allionia nyctaginea Michx. Heart-leaved Umbrella-wort. (Fig. 1416.) 



Allionia nyctaginea Michx. Fl. Ror. Am. i: loo. 

 Oxybaphus nyctagineus Sweet, Hort. Brit. 429. 



Stem angled, often 4-sided below, rather slender, 

 glabrous or but slightly pubescent, i -3 tall . Leaves 

 broadly ovate, 2 / -4 / long, i'~3' wide, acute at the 

 apex, cordate, rounded or truncate at the base, all 

 petioled except the small bract-like uppermost ones, 

 glabrous or nearly so; peduncles and pedicels com- 

 monly somewhat pubescent; involucre shorter than 

 the flowers; perianth red; stamens 3-5, exserted; 

 style exserted; fruit oblong or narrowly obovoid, 

 very pubescent. 



In dry soil, Minnesota to the Northwest Territory, Illi- 

 nois, Louisiana, Texas and New Mexico. May- Aug. 



Allionia nyctaginea ovata (Pursh) Morong, Mem. Torr. 



Club, 5: 146. 1894. 



Allionia ovata Pursh, Fl. Am. Sept. 97. 1814. 

 Oxybaphus nyctagineus var. oblongifolius Torr. Bot. 



5lex. Bound. Surv. 174. 1859. 



Leaves oblong, lanceolate, pblanceolate or obovate, 

 not at all cordate at the base; inflorescence very pubes- 

 cent. Nebraska to Texas and New Mexico. 



2. Allionia albida Walt. Pale I'mbrella- 

 wort. (Fig. 1417.) 



Allionia albida Walt. Fl. Car. 84. 1788. 

 Oxybaphus albidus Choisy in DC. Prodr. 13: Part a, 

 434. 1849. 



Stem erect, furrowed or striate, 4-sided below, 

 i-3 tall, glabrous or pubescent above, the pe- 

 duncles and branches commonly more or less 

 glandular and viscous. Leaves lanceolate or ob- 

 long-lanceolate, 3-veined from the base, glabrous, 

 pubescent or ciliate, the upper sessile, the lower 

 short-petioled; involucre much enlarged in fruit, 

 pubescent, ciliate, becoming whitish and purple- 

 veined; perianth pink or lilac; stamens and style 

 often exserted; fruit with 5 or 6 obtuse hispid 

 ribs, roughened in the furrows. 



South Carolina to South Dakota and Colorado, 

 south to Florida, Missouri and Texas. May-Aug. 



3. Allionia hirsuta Pursh. Hairy Um- 

 brella-wort. (Fig. 1418.) 



Allionia hirsuta Pursh, Fl. Am. Sept. 728. 1814. 

 Oxybafhus hirsutus Choisy in DC. Prodr. 13: Part 2, 

 433- 1849- 



Stem slender, i-3tall, erect, angled and stri- 

 ate, glandular-pubescent, especially at the nodes, 

 occasionally glabrate toward the base. Leaves 

 lanceolate or linear-lanceolate, obtuse at the apex, 

 sessile or the lowest sometimes short-petioled, 

 pubescent, i '-3' long; branches and petioles very 

 pubescent; inflorescence usually contracted; 

 stamens often 5; fruit narrowly obovoid, the ribs 

 obtuse, sometimes with low intermediate ribs in 

 the furrows. 



In dry soil, Minnesota to the Northwest Territory, 

 south to Wisconsin, Colorado and Texas. July-Aug. 



