AMARANTACE# (Cooke and Wright). 403 
stigmas 2-3, erect or recurved ; ovules solitary or many, amphi- 
tropous, erect or suspended from basal funicles. F'ruit a membranous 
utricle (rarely a berry), irregularly breaking up or cireumscissile. 
Seed lenticular, oblong or orbicular-reniform, compressed or rarely 
turgid ; testa crustaceous, smooth or nearly so; embryo annular, 
surrounding copious albumen. 
Herbs or undershrubs (rarely trees), usually erect, seldom scandent ; leaves 
simple, entire, opposite or alternate ; flowers small or minute, in spikes or heads 
or rarely racemose ; bracts and bracteoles usually hyaline. 
Disrris. Species about 600, in tropical and warm climates. 
Tribe 1. CELosiex.—Anthers 2-celled. Ovules 2to many. Leaves alternate. 
I. Celosia.—Filaments united at the base. Staminodes none or very 
short. 
Il. Hermbstedtia.—Filaments united high up. Staminodes longer than 
the filaments. 
Tribe 2. AMARANTER.—Anthers 2-celled, Ovules solitary. 
* Ovule erect ; funicle short. 
III. Amaranthus.—Zeaves alternate. 
** Qvule on a long basal funicle. 
+ Flowers usually several under each bract, some sterile. 
{ Staminodes none. 
IV. Sericorema.—Fruit glabrous. Flowers fertile and sterile in each 
cluster. eaves alternate, narrow. 
XI. Pupalia.—Fruit glabrous. Flowers fertile and sterile in each cluster. 
Leaves opposite, broad. 
V. Marcellia.—Fruit hairy. Flowers fertile and sterile in each cluster. 
Leaves opposite. 
VI. Leucosphera.— Fruit hairy. Flowers fertile only. Leaves alternate 
or opposite, 
tt Staminodes present (except in Centema subfusca and Sericocoma 
avolans). 
VII. Cyphocarpa.—Fruit horned. Sterile flowers reduced to straight 
spines. Leaves opposite. 
VIII. Sericocoma.—Fruit not horned. Sterile flowers reduced to straight 
spines, or absent. Leaves alternate or opposite. 
IX. Centema.—Fruit not horned. Sterile flowers reduced to straight 
spines, thickened and united to the base of the fertile flower. 
Leaves opposite. 
X. Cyathula.—Fruit not horned. Sterile flowers reduced to hooked 
spines. Leaves opposite. 
++ Flowers solitary under each bract, bibracteolate, all hermaphrodite. 
XII. Psilotrichum.—Staminodes none. Leaves opposite. 
XIII. Zrva.—Staminodes present. Filaments connate at the base. 
Perianth woolly. Leaves opposite and alternate. 
XIV. Calicorema.—Staminodes present. Filaments connate at the base. 
Leaves alternate. ag 
Da 
