Lentibulariaceae The Bladderworts, of which there are at least fourteen species in New York, form a very interesting group of plants. Few of them, however, have conspicuous flowers. Nearly all of them are aquatic, but two or three are found growing in moist or wet sand.

One of the most conspicuous and beautiful of the Bladderworts is the Horned Bladderwort (Stomoisia cornuta (Michaux) Rafinesque), figure XXIX, frequent in bogs and on sandy shores. Unlike most other species of the group, it possesses only a few inconspicuous and delicate leaves at the base of the scape; the latter, however, is conspicuously brownish, 2 to 13 inches high, bearing one to five bright yellow, fragrant flowers; the lower lip of the flower is nearly two-thirds of an inch long, with a conspicuous hoodlike palate, the spur often one-half of an inch long and pendulous beneath the flower.

Figure XXIX Horned Bladderwort (Stomoisia cornuta (Michaux) Rafinesque)

Figure XXIX Horned Bladderwort (Stomoisia cornuta (Michaux) Rafinesque)

In addition to the two species illustrated here, Stomoisia cornuta and Utricularia intermedia, the other species may be identified by means of the following key.

Calyx inclosing the fruit; bracts at the base of the pedicels accompanied by a pair of bractlets; plants terrestrial, rooting in sand beneath shallow water or on wet shores Corolla much exceeding the calyx (genus Stomoisia Rafinesque)

Lower lip of corolla one-half to two-thirds of an inch long; spur one-fourth to one-half of an inch long.........................Stomoisia cornuta

Lower lip of corolla one-third of an inch long; spur about one-third of an inch long or less......................................Stomoisia juncea

Corolla shorter than or about equaling the calyx.......Stomoisia virgatula

Calyx not inclosing the fruit; bracts at the base of the pedicels without bractlets

Lateral lobes of the lower lip of corolla saccate, branches verticillate and verticillately or oppositely decompound; corolla red-purple (genus Vesiculina Rafinesque)......

Yesiculina purpurea Lateral lobes of lower lip of corolla not saccate; branches alternate or none

Bract solitary, tubular, surrounding the scape; scales none; flowers purple (genus

Lecticula Barnhart)........................Lecticula resupinata

Bracts and scales peltate; plants terrestrial in wet sand (genus Setiscapella Barnhart) Corolla yellow, lower lip conspicuous, one-eighth to one-third of an inch long; spur conic.......................Setiscapella subulata

Corolla white or purplish, both lips minute; flowers about one-sixteenth of an inch broad or less..............Setiscapella cleistogama

Bracts, and scales if present, flat, usually attached, plants aquatic; flowers yellow (genus Utricularia Linnaeus) Scape 2 inches long or less with a whorl of more or less united conspicuous floats; corolla one-half to two-thirds of an inch long....................

Utricularia radiata Scapes without floats

Steins free-floating, except for a single point of attachment

Scape two to five-flowered, without scales, cleistogamous flowers also present...................Utricularia geminiscapa

Scape six to twenty-flowered, with one to five scales; cleistogamous flowers none................Utricularia macrorhiza

Stems creeping on the bottom in shallow water; some or all of the leaves rootlike

Spur a mere sac; palate obsolete; pedicels recurved in fruit........

Utricularia minor Spur and palate conspicuous; pedicels ascending in fruit

Segements of some leaves linear, flat, bristly-serrulate; upper lip of corolla about one-haif the length of the lower lip......

Utricularia intermedia Segments of leaves all capillary; lips of corolla nearly equal in length

Spur stout, conic, shorter than the lower lip............

Utriculariagibba Spur slender, equaling or exceeding the lower lip Spur tapering from base to apex; leaves all alike; bladder-bearing ; scapes 2 to 5 inches high....................

Utriculariapumila Spur conic at the base, linear above; leaves not all bladder-bearing; scape 4 to 16 inches high....................