HEXANDRIA. TRIGYNIA. 237 



sliiiniig, integument coriaceous; episperm wliite and mem- 

 branaceous. Nucleus greenish, consisting of an ovate cy- 

 iindric and homogenous somarhize, marked at its inferi- 

 or extremity (or contiguous to the umbiJicus) with an al- 

 most imperceptibly minute gemmule, in the form of a 

 diaphanous point. 



The only species of the genus, common to morasses in 

 the north of Europe. From the singularly isolated occur- 

 rence of this plant in the milder states of America, I am 

 inclined to believe it on the decrease in such situations. 

 In the turf morasses, or moors as they are called, in the 

 northern parts of Yorkshire, (Craven) in England, I have 

 commonly seen the sij\gular vestiges of this plant inlajed 

 through spongy or more recent turf, obtained where none 

 of the plant exists at the present day. 



350. TRIGLOCHIN. L. (Arrow-grass.) 



CflZio: double, eacli 3-leaved, the interior more 

 petaloid. Corolla m)WQ» Stamina S ov 6, Styles 

 none; stigmas 3 or 6, pubescent. Capsules 3 or 

 6, united above to a receptacular axis, separat- 

 ing at the base, each one-seeded, not spontane- 

 ously opening. 



Marsh plants with fibrous roots and grassy sheathing 

 leaves; scape naked, flowers spiked, numerous, inconspi- 

 cuous; anthers sessile, disposed in 2 series of 3 each (at 

 least in T. maritimuni); stigmas 3 to 6. 



Species. 1. T. * elatum. Persistent styles and capsules 

 6; frui' angular; capsules linear, dorsally depressed, with 

 acute margins; scape much longer than the leaves. Has. 

 In fresh, and probably also in sali-water marshes, in the 

 state of Xew York. Cenainly a very distinct species from 

 T. mariUmum, the fruit bearing no sort of resemblance. 

 Obs. Scape about 2 feet high; leaves very narrow; stami- 

 na 6, in 2 series, each subtended by a calix of 3 leaves, 

 maturing at different times. Spike nearly a foot long; 

 fniitsubcylindric, attenuated towards the persistent styles, 

 6-angled; capsules obtuse at the base, acutely compressed 

 on tJie margins, and dorsally channelled, united above to 

 a common persistent axis (similar to that which exists \\\ 

 umbelliferous plants), constantly 1-seeded, not spontane- 

 ously opening, thou,i;h furnished with a distinct internal 

 earinated su'ure. 2. maritimum. o. palustre. Flowers tri- 

 androus, capsules linear. 4. triandruui. Fruit roundish.— 

 In South CaroUnJi. 



