216 HEXANDRIA. MOXOGYNIA. 



unequally inserted, S of them upon the summit 

 of th« tube. Utriculus miiv'iciite, 1-seeded. 



Aquatic plants; leaves partlj^ radical, of a form betwixt 

 cordate and sag-ittate; scapes uiiifoliate; flowers agi^re- 

 gated in s|)ikes, or fastigiated in unequal umbells, colour 

 blue, upper lip marked with a discolotired spot. 



Species. l.F. cordata. Hab. Cluefly within the limits 

 of tide-water, throug-hout the Atlantic coast. Obs. Leaves 

 sheathing-, sheath entire; petiole about one third the 

 length of the leaf. Spike at first protected by an ovate 

 spathe, pubescent. Flowers aggregated by 3's and 4's, 

 sessile, bilabiate, upper lip flat, 3-toothed, blue with a 

 greenish variolate spot in the centre; lower lip 3-paried; 

 tube curved, about equal in length with the limb, marked 

 with 6 longitudinal strix, and on the under side singularly 

 perforated with 3 gashes or longitudinal foramina. Sta- 

 mina 6, 3 near the base and 3 towards tlie summit of the 

 tube; the 3 exserteil stamina of the lower lip variable in 

 length. Style filiform, blue, niarcscent with the corolla 

 and usually about its lengih, shortest when tli^ stamina 

 are most exserted; stigma entire, minute. Germ rather 

 gibbous, ovate, 1-seeded. Fru'* a 1-seeded, greenish, mu- 

 ricated 'Uriculu? fo^-m^ ..e persistent calicine base of 



the coro /li- cvlsiated ages of the fruit 6. Perisperm 

 ovoid,.conic, very white, sweet and farinaceous, (probably 

 nutritious.) Corctilum in the axis of the peri.sperm, cylin- 

 dric, inverted, (or with the radxal upwards); gemmala f 

 oval, conspicuous. 



2. angustifolia. Pu -sh. lior. Am. 1. p. 224. Leaves 

 acute, elo^'-ated-triangular. base trui. -ic^-'Subcordate, seg- 

 ments of tne lower lip o'"ti)e corolla linear-lanceolate- — In 

 subalpine lakes on the Alleghany mountains. New York, 

 &c. jP. miicronata? Kafinesque New York, Med. llepos. 

 2. p. 3.V. 



3. * lunceolata. Leaf narrow, oblong-lanceolate, obtuse, 

 base entire, petiole very short; spike short. Hab. Near 

 Savannah in Georgia — i3i. W. Baldw)n. Also in South 

 Carolina. Scape less than a fooL ^ .g; spathe very obtuse. 

 Loaf iicarly a span long, about an inch wide, very opaque, 

 in P- curduta the leaf is diaphanous vrhen held to the lighi. 

 Corolla blue, segments of tlie lower lip linear, longer than 



t JAttle bndy this word is used here to distinguish betwixt 

 true and ajiparent cotyledones, in the present plant there is no 

 proper cot} ledones, merely a minute bud .*»imilar to the per- 

 fect plant. 



