954 GUNNERACEAE 
ne plan Flowers perfect, with the perianth in 3’s, na Sepals broad, 
eres deltoid, green or sometimes whitish. tamen Stigmas 3, erect. 
Fruit 3-earpellary. Four species, North Ame Um 
Leaves all nearly alike and pecti inate; blades of those DARNE Uic flowers or 
flower-clusters finely pectinate : stigmas stout. pectinata. 
Leaves all nearly alike and toothed ; blades of those subtending 
he flo s or flower-clusters ri or rrulate, or the 
der. 
Fruit mot auricled ; nutlets with even or uneven angle 
Fruit ovate or suborbicular ^ outline, with A or 
rounded angles, and turgid faces. 2. P. amblygona. 
Fruit deltoid or rhombic in outline, with acute or margined 
angles, and concave faces. 3. P. palustris 
Fruit auricled; nutlets with prominently appendaged angles. 4. P. platycarpa. 
1. P. pectinata Lam. Leaf-blades e to ovate in outline, 1-3 cm. long, 
one- ies as dido m nearly so, the segm ments slender or filiform: subulate, about as 
Hie pis rachis: fruit ovoid or glo ida 
soid, mm. us pid pb 
"uu -—Ponds, ditches, and sluggish 
streams, various o es, Fla. to La. and 
Me.—Sypr.-fall.— LI is less widely 
distributed tha 21s o following, and is 
more decidedly piste to eoastal regions. 
2s. P. amblygona (Fernald) Small. Leaf- 
tu 
wide as lon rate s 
pinnatifid or noctinate: the se mene coarse 
d 
ong, tuberenlate-roughened, thick- 
REN —Ponds, mp d ditches, Had 
ous provinces Ga. "to T EUN and 
Spr.—fall —— Specimens of “this species Eon Georgia have been erroneously 
referred to P. intermedia Mackenz 
3. P. palustris L. Leaf-blades elliptic, linear, linear-lanceolate or broadened 
upward, mostly 2-6 cm. long, serrate or serrulate, or the submersed ones pin- 
natifid or pectinate, the segments slender: fruit pyramidal or zioni odas 4-5 
mm. E thin-angled, 2 m m ned.— ROS -WEED.)—Moist soil, 
N. S.—Spr.—- 
4. pupa. Small. E es elliptic varying to pea Apod or 
Mug 1-3 em. long, serrate, or those of the dA deeds ones, or aquatic 
forms all iets: ruit broad, mostly obreniform by the auricled ns bo 
per 
faces sparingly rugose.—Pools, lim sinks, and cypress swamps pen. Fla.; 
haps further N along the Atlantic coast —(W. I.)—A1 yea 
IOPHYLLUM L. Herbs with mostly submersed stems, 
some mcs ereeping in the mud. Leaves alternate to whorled: blades of "s 
emersed (floral) ones entire, toothed, or bou: those of the submersed ones 
larger and with finer DANI than the ers. Flowers monoecious or polyga- 
mous, with the perianth in 4’s and the staninae ones petaliferous, green, red, 
or purplish. Sepals dr na Sta r 8. Stigmas 4, recurve 
Fruit 4-carpellary.— About 20 species, mn pica .—W ATER-MILFOILS. 
DES 
