tlXOGENS. 63 



of fls. red, In a long drAoping panicle. Ind. Pig. 121. A. spedbsa, 

 Prince's Feather, Ivs. purple, fl. spikes erect, crimson. A. tricolor, 

 Joseph's Coat, Ivs. brilliantly variegated with red, yellow, purple. 

 China. 5, Celosia cristata, CocK's-coMB. Q. Infl. anomalous, 

 crested, bright red, rose, yellow, or white. Ind. 



Ord. 31. Polygonaceae. Bitckwheats. — Fls. gor diclinous, mono- 

 chlamyd. Infl. sol. or compound. Perianth usually. colored, disk 

 lining its base. Sta. 1-15. Ova. sol., of 2-4-oarpels. Fr. a 3-angled 

 akaine or caryopsis in the accrescent and sometimes fleshy calyx. 

 Herbs, rarely Shrubs, erect or twining, rarely leafless, stemless. Stem 

 jointed, tumid; Ivs. alt. simple, usually ochreate. 33 gen., nearly 

 400 spec, temp, regions, cosmop. 



1. Antigonon leptbpus. Fls. g . Perianth-segments 5, petaline, 

 colored ; 3 outer large. Handsome, sub-shrubby, twining high ; Ivs. 

 broadly cordate ; fls. large, rose-color, in large showy racemes. Mexico. 



2. Polygonum. Fls. pink or white, spiked or racemed. Many species. 

 Herbs or undershrubs, including the Smartweeds (juice acrid). Knot- 

 grasses, and Climbikg Buckwheats. Fig. 3. . 3. Triplaris. Fls. 

 9 § c?. Trees or shrubs. S. Am. T. Schomburgkidna, tree ; inter- 

 nodes hollow, occupied by venomous ants. Guiana. 4. Fagopyrum 

 eseulentum. Buckwheat. Q herb. Fls. g , white, panicled, fragrant. 

 Sds. farinaceous. Asia. 5. Riimex, Dock, Sorrbl. Herbs or under- 

 shrubs. Many species, both worlds. Common. Foliage acid. R. 

 Acetosella. Fr., vert, sec. Fig. 189, A; raphides. Fig. 235 A. 6. 

 Rheum, Rhubarb. Sev. spec. Cent. Asia. Perennial, rhiz. large, 

 often bitter, medicinal ; Ivs. acid. R. nobile. Lvs. rad., large. Infl. 

 5° high, cone-like, of large straw-colored imb. bracts edged with pink. 

 7. Eriogonum. Kesembles Buckwheat, but lvs. exochreate, fls. invo- 

 lucrate. TJ. S., S. and W. 



Ord. 32. Phytolaccaceae. Pokeberries. — Fls. g , rarely 9 c^i 

 mono- or dichlamyd., 4-5 merous. Infl. comp. Ova. of 1 carpel, or 

 00 carpels whorled. Fr. a berry, utricle, coccus, or samara. Herbs, 

 Undershrubs, or Trees. Lvs. simple, entire. 20 gen., 80 species. 

 "Warm regions, Am., Asia, Af. I. Phytolacca. Fr. many-carpelled, 

 berry-like. 10 species. P. decdndra, Common Pokbberry. Branch- 

 ing herb, 8°-12° high. Berries dark purple, racemed. 2. Rivina. 

 10 spec, trop. Am. Undershrubs, fls. racemed. R. humilis, small; 

 with lovely racemes of small scarlet berries. Texas to Brazil, W. Ind. 



3. Pirciinia dimca, Bella-Sombra. Fls. 9 (^. Tree, stem enor- 

 mously swollen at base, hd. spreading. La Plata. 



Ord. 33. Nyctaginaceae. Prbtty-by-nights. — Fls. § , rarely 

 diclinous ; ' monochlarayd. ; usually involucrate. Perianth petaloid, 

 tubular, colored. Ova. 1-carpelled, 1-celled. Fr. an akaine, included 

 in the accrescent woody perianth-tube. Trees, Shrubs, Herbs, knotty, 

 often spiny. 20 gen., 100 spec; warm regions, both worlds. 1. 

 Neea. Fls. exinvolucrate, panicled. Trees and shrubs, trop. Am. 

 2. Bougainvillea. Fls. small, in threes, concealed by large showy 

 bracts, in splendid massy panicles. Sev. spec, S. Am. B. spectdbilis, 

 climbing shrub or small tree ; bracts rose-color. 3. Abronia, Q|. herbs. 

 Perianth salver-shaped, flower-like, small, bracts small. Fls. umbelled, 

 fragrant. A. MmfteWdte, day-blooming, fls. purple, Cal. A./rdgrans, 

 vespertine, Kooky Mts. 4.'Ox3?baphus. Q|. herbs. Fls. small, rose- 

 purple, few together, surrounded by an accrescent salver-shaped invo- 



