EE 
GUNNERACEAE 955 
Sepals broad and short: plants monoecious or polygamous. 
Stamens 4: corolla persistent. 
Floral leaves with entire or serrate blades: anthers mea petals PE 
'ate. . M. heterophyllum 
Floral leaves with ineised-pinnatifid blades: anthers 
lE petals elliptic. 2. M. pinnatum. 
Stamens 8: corolla deciduous. 3. M. larum. 
Sepals lone and slender: plants dioecious. 4, M. proserpinacoides. 
1. M. heterophyllum Michx. Leaves in 4’s to 6’s; blades of the usually 
crowded submersed ones with 6—10 un bea! of linear-filiform or capillary seg- 
ments; those of the floral ones elliptie, ovate, 
linear, or broadened upward, serrate: petals 
broadly ovate, 2-2.5 mm. long, porn 
n 
long: fruit globose-ovoid, 2-2.5 mm. lon 
d 
earpels with orsal ridges, med 
roughened.—Ponds ae sluggish streams, 
E provinees, Fla. to Tex., Minn., Ont., 
N. J.— 
um.—Forms o 
heterophyllum have often been erroneously 
referred to M. verticillatum in our range. 
2. M. pinnatum (Walt.) B. S. P. Leaves 
in 3’s to 6’s, or some of them scattered; 
spa E. hes p crowded submersed 
^as T. pairs of a seg- 
those of the n ones narrow, prede icu ME thus jagged-edged; 
SC elliptic, 1-1.5 m ong, doin anthers nearly 1 mm. long, obtuse: fruit 
oval or globose-ovoid, Ls 5— "s ong; carpels with 2 puc n Po — 
Ponds, ditches, and muddy e various provinces, Fla. and Man. 
—(W. I.)—Spr.-su um. 
M. laxum Shuttlw. Leaves in 4's; blades of the PE E submersed 
ones with 3-7 pairs of a diis ments; those of the floral ones spatulate: 
petals elliptic, 2.5-3 long: anthers line ear to narrowly elliptic, about as 
long as the i. fruit ovoid- bep about 1.5 mm. long; earpels maa 
warty. - Ponds and lakes, Coastal Plain, N Fla., S Ga. and S Ala.—Sum 
4. M. proserpinacoides Gill Leaves in 4's and 5's, feather-like; blades 
of the submersed and floral ones nearly or quite up all rather remote, 2 
mostly 10—15 pairs of linear-subulate or rarely r ar- ~spatulate segm 
e i r sle nae 
(WATER-FE PARROT ’S-FEATHER. )—Pools, and ditches, M Plain, Fla, 
to Tex.; KR ‘locally as a N as N. Y.—Native of S. Am.—Spr.-fall. 
Order AMMIALES 
Herbs, shrubs, trees, or vines. Leaves alternate or opposite: blades 
simple or compound. owers perfect, polygamous, or dioecious, often 
borne in umbels. Calyx of typically 5 small sepals surmounting tlie 
hypanthium. Corolla typically of 5 petals, or wanting. Androecium of 
as many stamens as the sepals. Gynoecium 2-carpellary or rarely several- 
l-earpellary. Ovary inferior. Fruit drupaceous or baccate, or dry an 
then a cremocarp. 
Fruit ee or baccate: gynoecium 1-several-carpellary, if 2-carpellary, stigmas 
Po single or united: ovule with a dorsal raphe: leaves mostly opposite; blades 
ntire or merely toothed. Fam. 1. NYSSACEAE. 
