BRASSICACEAE 557 
1-6: anthers ovoid to globose. Style very short. Pod short or elongate. Seed 
turgid. [Nasturtium R. Br.]—About 50 species, widely distributed.—WATER- 
CRESSES. MARSH-CRESS 
Annual or biennial plants with or roots. 
I. PALUSTRES. 
Po elongate, linear-filifor II. HETEROPHYLLAE. 
Perennial plants with c Da ‘or horizontal rootstocks. III. SYLVESTRES. 
Pedicel short, much less than half thé length of the pod. 
Leaf-blades bipinnatifid: style 1-2 mm. long: pod narrowly 
- elliptic, curve 
Leaf-blades 1- -pinnatifid : style almost wanting: pod broadly 
elliptic, straigh 2. R. sessiliflora. 
Pedicel rather fone half the rica of the pod or more. 
Pod ellipso abro 
1. R. Walteri. 
id: stem gla 3. R. palustris. 
d oval, ovoid, or ipeloboces stem hirsute. 4. R. hispida. 
II. IIETEROPHYLL 
Bu diffuse, the leaves usually B : Jarge ena lobe: flow- 
with inconspicuous white co 5. R. heterophylla. 
III. SYLVEST 
Plant with rather large yellow corollas and eh narrow slender 
pedicelled pods. 6. HR. sylvestris. 
1. R. Walteri (EIL) Small. Stem often diffusely branched, 1-4 dm. tall: 
cauline leaves 2-10 em. long; blades NE the segments irregular: ‘petals 
slightly longer fan: the sepals: pod Tong 
beaked. [N. tanacetifolium (Chapm. F1.)] 
—Low grounds, fields, and ditches, Coastal 
Plain and rarely adi. provinces, Fla. to 
Tex., Okla., and S. C.—(Afez.) —Spr. 
2. R. sessiliflora (Nutt.) A. Hitche. Stem 
cauline leaves 
3-15 obed o 
pinnatifid: petals 
sepals: pod short-bea 
wet banks, various terc d Fla. to Tex., 
Nebr., Ia., and D. C.—Spr.-sum 
3. R. palustris E e Stem glabrous 
or minutely pube , 2-10 dm. tall: leaf- 
blades oblanceolate an elliptie Or ted “elliptic, p = toothed or repand 
abov long: ovary elliptic: pod 5-8 m ong.— (MARSH-CRESS. 
die cin ees Tod grounds and meadows, various To Fla. 
to Tex., Ariz., Alas., Ont., and N. B. Apparently nat. of Eu.—Spr.-su 
4. R. hispida (Desv.) Heller. Stem hirsute or hispid, 3—12 dm. DE leaf- pus 
ped v ae pe or rarely only toothed, 2—18 cem. long: 
glo : po od 2 -3 m ng.—Sandy soil, S along rd various iud 
n N. C. to Tex., Calif and S Can.—Sum 
R. he dadas a (Blume) Small. e diffusely b eres the ne 
oe rous or nearly so: cauline leaves 3-11 em. long; bla 
r ovate-lanceolate in nee m accu e d lo bed o i 
flowers inconspieu ous: sepals 2-2.5 mm. long: petals about as long 
as the sepals or wanting: pod linear-filiform, 1.5 -2.5 em. long, stiffly ascending 
or spreading, straight ao oe and ditches, Coastal Plain, S Miss. and 
S La. Nat. of Asia.—Wint 
