. 472 AMARANTHACEAE 
hiscent.—About 60 species widely distributed in temperate and tropical regions. 
—Mostly weeds, but some species are cultivated for their colored inflorescences. 
—The flowers are green or red.—AMARANTHS. PIGWEEDS. TUMBLEWEEDS. 
Sepals of the pistillate flowers spatulate, clawed : flowers all Ru 
. CRASSIPES. 
Sepals of the pistillate flowers not spatulate: staminate flowers 
in terminal spikes or all flowers in axillary clusters in A. 
blitoides and A. graecizans. II. PANICULATI. 
I. CRASSIP 
Bracts pas pedicels much thickened.and duris: utricle 
indehis . A. crassipes. 
Braets ona. pedicels not thickened nor indurate: utricle 
circumscissile. 2. A. polygonoides. 
II. PANICULATI 
re dehiscen 
orescence of terminal or axillary simple or compoun 
spikes, and ua clusters of flowers often present 
in the leaf-a 
Doe AEE dehiscent: leaf axils without spines. 
Cid er than the aide or, if longer, acute 
minate. 
Bracts oDe or merely acutish, about equalling 
bor sepals or somewhat longer, usually red 
r purp 3. A. cruentus. 
Bracts acute or acuminate, usually twice as 
long as the sepals, usually green or pink. 4 . hybridus. 
ARPA oo longer than the utricle, obtuse or 5 
Utricle proce and imperfectly dehiscent: leaf 
axils with rigid spines. 6. A. spinosus. 
1. A. blitoides. 
8 
A 
A 
. A. retroflexus. 
A 
A 
A. graecizans. 
inflorescence v wholly of axillary cluster 
E 4 or 5: stem and branches Sroine 
Sepals 3: stem erect. 
Utricle indehiscen 
Utricle rugose. 
Flowers borne in axillary clusters: leaf-blades erisped. 9. A. crispus. 
Flowers borne in terminal and axillary spikes: leaf- 
blades flat. 
A narrow, linear to  elliptic-linear: 
0. A. muricatus. 
Leaf: blades broad, ovate to  rhombic-ovate: ` 
sepals 3. 11. A. gracilis. 
Du smoo oth. 
eaf-blades membranous: flowers partly in terminal 
pm ikes: seeds about 1 mm. in diameter 2. A. deflexus. 
Leaf-blades thick and fleshy: flowers all in axillary 
: 5 mm. in diameter. 3. A. pumilus. 
1. A. on E ht. us and branches 1-6 dm. long, stout: leaf-blades 
spatulate to ovate, 1—2.5 cm. long: stam ac ealyx 1.9-2.2 mm. long: pistillate 
ealyx 1. mm. oq soa spatulate, 
fet ouo A n ere Eri [i e. 
cras Moq.]— ocks and 
ae NE "Coastal ain, ES Fla. to 
Ala.—(W. I., S. A.)—AIl yea 
2. A. eo L. Stem and branches 
m 
diy 1-2 em. long: staminate calyx 0.9-1 
m. long: pi digan calyx 2.2-2.4 mm. long; 
S sepals pee de! ene [Amblogyna poly- 
f.]—Ha ocks and r sandy 
places “Coastal Plain, Fla. and Tex.—(W. I., 
Mez., C. A., S. A.) 
A. cruentus L. Stem 5-20 dm. tall, 
smooth: leaf-blades elliptie, ovate eU 
