CHENOPODEiE. 59 



3. MICROTEA, Sw. 



Calyx 5-partite. Petals 0. Stamens 5 (-8), nearly hypogynons, alternating wilh the 

 calyx. Ovary unilocular: ovule single, basilar; styles 2 (-5). Achenium scrobiculate, mu- 

 ricate. Embryo annular, encircling the perisperm. — Annual herbs ; leaves exstipulate ; ra- 

 cemes or spikes lateral ; flowers small, tribracteate. 



4. M. debilis, Su>. Flowers racemose: pedicels as long as the flower; inferior bract . , 

 subulate ; calyx-segments ovate, exceeded twice or more by the achenium. —Lam. III. t.\&%;ili 

 Sw. Fl. t. \%t analyt. — A delicate, diffuse herb, I'-IJ' high ; leaves ovate, tapering towards 

 the petiole; calyx ^'"-V" long, greenish-white. — Hab. S. Kitts, Dominica!, Imr.; S. Vin- 

 cent I, Guild.; Trinidad!, Loclch., Or.; [Panama! to Peru!, equatorial Brazil! and Guiana!], 



4. BIVINA, L. 



Calyx i-^sxiiie. Petals 0. iStoBzew 4-13, nearly hypogynons. Carpel io^iaxY : ovule 

 single, basilar ; style short, oblique. Or none. Achenium somewhat baccate, or dry. Embryo 

 annular, encircling the perisperm. — Shrubs ; leaves stipulate ; racemes terminal and lateral. 



Sect. 1. PiEECEA.— ySfemeK* 4, alternate with the calyx: anthers ovate, introrse. Style 

 with a capitate stigma. — Pedicels with a deciduous bract at the base. 



V 5. B. Irevis, i. Erect ; leaves ovate, pointed ; (;a/jra-(^JOT«o«« oblong or obovate, blunt, - 

 appress ed to the fruity — Bot. Mag. t. 2333. — A shrub, 6'-8' high, with herbaceous, delicate •^ 

 Tiranches ; flowers small, reddish-white ; berry globose, red, at length diy. — ^Linnseus distin- Q 

 guishes two species, which are mere varieties ; 



a. Glabrous. 



j8. pubescens. Branches and leaves pubescent. — B. humilis, L. E. purpurascens, Schrad. 



Hab. Jamaica !, IHst., Alex., March (o) ; Caribbean Islands ! ; Trinidad !, Schach, Cr.(j8) ; 

 [Horida !, Texas !, Cuba ! to Brazil I, Mexico ! to Ecuador I]. 



Sect. 2. TiLLAMiLLA. — Stamens 8-12 : stamens sagittate, extrorse. Stigma sessile, 

 penicillate. — Pedicels with a bract above the base. 



6. R. octandra, Z. Subseandeut; leaves elliptical or elliptical-lanceolate, pointleted, 

 glabrous ; palyx-divisions ovate, rounded, at length reflexed : veins reticulated. — Br. Jam. t. 

 23./. 2. — Trichostigma rivinoides. Rich. Cub.—k trailing shrub, 15'-20' high ; racemes 

 lax, usually exceeding the leaves ; flowers larger than iu the preceding, whitish ; berry pur- 

 plish-black. — Hab. Jamaica!, Pd., Alex., March; S. Vincent!, Guild.; [Cuba! to Vene- 

 zuela!, New Granada!, Peru!]. 



5. PETIVERIA, L. 



Calyx 4-partite. Petals 0.. Stamens 4-6-8, nearly perigynons : anthers sagittate. Car- 

 pel soHtary : ovule single, basilar ; stigma sessile, penicillate, lateral. Achenium terminated 

 with 2-4 bristles. Embryo straight ; albumen obsolete, lateral. — Suffrutesoent herbs ; leaves 

 stipulate ; spikes terminiA, interrupted, elongated ; flowers tribracteate. 



7. P. alliacea, i. Leaves elliptical or oblong, pointed ; spikes slender; stamens t-%; -f 

 fruit with 2 bristles.— /fflcj. Amer. Pict. t. 104 ; Desc. Fl. 5. t. 374.— Stem 2'-3' high; r' 

 leaves glabrous ; spikes often 8"-12" long : axis puberulous ; calyx whitish, 2'" long : divisions /i 

 linear, blunt. The whole plant has an alliaceous smell. — Hab. Jamaica !, Alex. ; S. Kitts !, 

 Els.; S.Vincent!, Guild.; Trinidad !, iocM. ; [Southern United States, Cuba !, and Mex- 

 ico ! to Kio Grande do Sul !]. 



XXII. CHENOPODE^. 



[Basellacese. Batideaj.j 



Flowers apetalous. Stamens nearly perigynous, opposite to the herbaceous calyx. Ovary 

 mostly unilocular : ovule single, basilar ; styles usually 2 (-3-5). Embryo excentrical : peri- 

 sperm central, mealy, rarely wanting. — ^Leaves simple, exstipulate. 



