AMMIACEAE 
Eua. Hur M eed cross- n e Pus 
duncles 3—7 em. long, su 
frit, orbieular- -ovoid, ees near the base 
abou . long, the lateral ribs corky, the 
dorsal pug at all eorky.  [Crantzia ears 
tt.]—Salt or brackish marshes. and lov 
unds, Coastal Plain and New England 
Coast, Fla. to Miss. and Mas 
2. L. pigrum. Cou & 
.0 em. 
suborbieular or oval-orbicular, 
long, not pinched near the base ; all the ribs eorky.—Low grounds, Coastal 
Plain, Fla. to N. C. 
16. SPERMOLEPIS Raf. Annual herbs. Leaf-blades finely dissected. 
Umbels compound. Involucres wanting. Involucels of few narrow bracts. 
Sepals minute or obsolete. Petals white. 
pels with 5 prominent or obsolete ribs: oil-tubes solitary in the intervals and 
sometimes under each rib, except in the inner side where there are two.—Four 
Species, natives of North America.—Spr. 
Fruit tubercled. 
Umbel-rays divaricate, the pr m ones mostly 3 or 4. S. even ee: 
Umbel-rays erect or nearly s eet ones mostly 6- 8. A S. pa 
Fruit covered with short bristly “hooked hair 3. S. PE 
. S. divaricata (Walt. Raf. Stem 1-6 dm. tall, often widely branched, 
sometimes diffusely so, the branches nA slender or l5 filiform: leaf-blades 
2-8 ately 
m. lon tyi e t 2 M 
pas ^ oe narrowly iu or fili- 
ou : 
ndy soil, various pounce. Fla. 
o N. M., Kans., and N. C. 
S. patens (Nutt.) B. L. Robinson. 
a 2—6 ~ Pai segments filiform: 
fruit ovoid, t 1 mm. long, granular.— 
*3 
Dry soil, ous ONU. Tenn. to Tex 
Nebr., and In d. 
3. S. echinata (Nutt.) Heller. Stem 1-5 
; tall, more of less diffusely branched: 
leaf-b ades 1-6 em. long; twice 
inea 
thriee pinnately ipd cus narrowly 
linear or filiform: umbe slender-peduncled, slender, 
more or less variable in ae a white, les qw" 1. mm. DM frui t 
pe below the middle, 
obsole 
ong, are with hooked bristles, the ribs 
te.—Dry soil, various uc Ala. to Tex., Calif., and Mo.—(Mez 
17. ERIGENIA Nutt. Perennial herbs with tuberous roots. Leaf-blades 
ternately decompound. Umbels few-rayed, compound. Involucres usually of a 
