GENUS 3. 
6. Utricularia geminiscapa Benj. Hid- 
den-fruited Bladderwort. Fig. 3866. 
Utricularia geminiscapa Benj. Linnaea 20: 305. 
1847, 
U. clandestina Nutt.; A. Gray, Man. 287. 1848. 
Stems about 8’-10’ long, floating horizontally 
beneath the surface of the water, sparingly 
branched. Leaves alternate, about 10” long, 
4-7-dichotomous, and bladderless, or more or 
less reduced and bladder-bearing; scape slen- 
der, 2-5’ high, 2-5-flowered, without scales; 
cleistogamous flowers solitary on short pedun- 
cles, 1 at the base of the scape and others scat- 
tered along the stems, often in pairs; pedicels 
of conspicuous flowers 2”-3” long; corolla 
yellow, 3” long or more, the lower lip longer 
and broader than the upper, 3-lobed, with a 
prominent palate; spur a little shorter than 
the lower lip, obtuse. 
In shallow water, New Brunswick to Virginia. 
Hooded or horned milfoil. July—Aug. 
Oklahoma, Arizona, and Lower California. 
BLADDERWORT 
May-Aug. Often propagated by winter-buds. 
FAMILY. 
7. Utricularia macrorhiza LeConte. 
Greater Bladderwort. Hooded 
Water Milfoil. Pop-weed. 
Fig. 3867. 
Utricularia macrorhiza LeConte, Ann. Lyc. N. Y. 
2:73. 1824. 
U. vulgaris var. americana A. Gray, Man. Ed. &, 
318. 1867. 
Stems 1°-3° long, floating horizontally be- 
neath the surface of the water, sparingly 
branched. Leaves alternate, #’-2’ long, dichot- 
omous at the base, each ray pseudo-pinnately 
divided, bladder-bearing, the bladders some- 
times 2” long; scape stout, 3’-24’ high, 6-20- 
flowered, with I-5 auriculate scales; pedicels. 
3-8” long, becoming 5’-10” long and recurved 
at maturity of fruit; corolla yellow, 7’’-10” 
long, the lower lip a little longer and much 
broader than the upper, with a spreading, un- 
dulate, slightly 3-lobed border, and a promi- 
nent palate; spur shorter than the lower lip, 
subulate, upwardly curved, acute or obtuse. 
In stagnant water or sluggish streams, New- 
foundland to Yukon, south to Maryland, piety 
ery 
variable, but appears to differ constantly from the related and equally variable European species, 
Utricularia vulgaris L., by the longer stems, the 
shape and direction of the spur, and the minute- 
ness of the appendages (rudimentary stolons) at 
the base of the scape. 
8. Utricularia radiata Small. Small 
Swollen Bladderwort. Fig. 3868. 
Utricularia inflata var. minor Chapm. FI. S. U.S. 
282. 1860. Not U. minor L. 1753. 
Utricularia radiata Small, Fl. SE. U.S. 1090. 1903. 
Stems long, floating horizontally beneath 
the surface of the water. Leaves alternate, 
6-10-dichotomous, usually less than 13’ long, 
bladder-bearing; scape 1-4-flowered, with a 
whorl of 4-7 inflated floats, above the floats 
13-4 high; floats up to 13’ long, lobed and 
finely dissected toward the apex; pedicels 4’’- 
10” long; corolla 6-9” long, the upper lip 
suborbicular, undulate, the lower lip about the 
same length but broader, 3-lobed, with a 
Prominent 2-lobed palate; spur conic, obtuse, 
appressed to and shorter than the lower lip. 
In ponds, Maine to Florida and Texas, near the 
coast. March—Sept. 
