LENTIB ULARIA CEAE. 845 



Corolla irregular, 2-lipped, the tube gradu lly enlarged above, the upper lip com- 

 pressed, obtuse or emarginate with a groove behind the margins, or these recurved 

 or with a tooth on each side; lower lip 3-toothed, 2 grooved beneath. Stamens 4, 

 didynamous, ascending under the upper lip; anther-sacs distinct, parallel, obtuse 

 or mucronulate at the base. Capsule flat, oblique, loculicidally dehiscent, 2-4- 

 seeded. Seeds smooth, strophiolate. [Greek, black wheat.] About 10 species, 

 of the northern hemisphere. Only the following are known in N. Am. 



Leaves lanceolate or linear-lanceolate, the floral 2-4-toothed at the base. 



1. M. line are. 

 Leaves ovate, all entire. 2. M. latifolium. 



i. Melampyrum lineare Lam. Narrow-leaved Cow-wheat. (I. F. 1. 

 3340.) Puberulent; stem obscurely 4-sided above, at length widely branched, 

 I.5-5 dm. high* Leaves lanceolate to linear-lanceolate, short-petioled, acuminate 

 or acute, 2.5-6.5 cm. long, the lower all entire, the upper floral ones ovate or 

 lanceolate, with 2-6 bristle-pointed teeth near the base; flowers short-peduncled, 

 8-12 mm. long; calyx about one-third the length of the corolla, its subulate teeth 

 longer than its tube; corolla white or whitish, puberulent, the lower lip yellow; 

 capsule 8-10 mm. long, twice as long as the calyx. In dry woods and thickets, 

 N. S. to Br. Col., N. Car., Ky. and Minn. Variable. May-Aug. 



2. Melampyrum latifolium Muhl. Broad-leaved Cow-wheat. (I. F. f. 

 3341.) Similar to the preceding, 3-5 dm. high, but the leaves all entire, short- 

 petioled, the lowest small, spatulate, obtuse, the middle ones lanceolate or ovate, 

 acuminate, narrowed at the base, 5-8 cm. long, the floral ovate or ovate-lanceolate, 

 shorter, acute, mostly rounded at the base; corolla purple, veiny. In dry woods, 

 Del. (according to Muhlenberg); Va. to Ga. and Tenn. June-Aug. 



Family 10. LENTIBULARIACEAE Lindl.* 



Bladderwort Family. 



Aquatic plants, or terrestrial on moist ground, with the leaves basal 

 and tufted, or borne on branching stems, or reduced to minute scales. 

 Scapes erect. Flowers perfect, irregular, the pedicels bracteolate. Calyx 

 inferior, 2-5-parted. Corolla 2-lipped, the upper lip usually erect, con- 

 cave, or the sides plicate, entire, or 2-lobed, interior in the bud ; lower 

 lip larger, spreading or reflexed, 3-lobed, with a palate projecting into 

 the throat and a nectariferous spur beneath, Stamens 2; anther-sacs 

 confluent into 1. Ovary superior, ovoid or globose, 1 -celled; ovules 

 numerous ; style short, or none ; stigma 2-lamellate. Fruit a capsule, 

 irregularly bursting, or dehiscent by valves. Seeds anatropous, rugose, 

 reticulated, or bristle-bearing; endosperm none. About 4 genera and 

 180 species, widely distributed. 



Aquatic or bog plants ; foliage often dissected and bladder-bearing. 1. Utricularia. 



Terrestrial ; leaves basal, tufted, entire. 2. Pinguicula. 



1. UTRICULARIA L. 



Herbs, floating, or rooting in the mud, the aquatic species with stems usually 

 bearing finely divided leaves and covered with minute bladders; marsh species 

 with a few bladder-bearing leaves or rootlets under ground. Bladders contracted 

 at the mouth, closed by an operculum and furnished with a few projecting bristles. 

 Flowers racemose or solitary at the summits of slender scapes, the pedicels 2-brac- 

 teolate. Calyx deeply 2-lobed, the lobes equal or nearly so. Corolla 2-lipped, the 

 upper lip usually erect and entire, the lower larger, 3-lobed, spurred at the base 

 and with a prominent palate, commonly bearded in the throat. Capsule many- 

 seeded. [Latin, utriculus, a bag, or little bladder.] About 150 species, of wide 

 distribution. Besides the following, some 4 others occur in the southern U. S. 



* Contributed by the late Rev, Thomas Morong. 



