VOL. III.] 



APPENDIX. 



495 



[Vol. i: p. 47.] 5a. Isoetes Dodgei 



A. A. Eaton. Dodge's Quillwort. 



(Fig. 1 06a.) 



Isoetes Dodgei A. A. Eaton, Fern Bull. 6:6. 1898. 



Plant amphibious from a bilobed trunk. 

 Leaves 10-75, S'-iS' long when submersed, 

 erect, or spirally ascending when scattered; 

 emersed leaves 4'-6' long, tortuous and often 

 interlaced, with numerous stomata and usu- 

 ally 4 bast bundles: velum narrow, covering 

 } to X of the sporange; sporanges thickly 

 sprinkled with light brown cells; macro- 

 spores more numerous on submersed plants, 

 globose, 500-675," in diameter, sparsely cov- 

 ered -with irregular crests which at maturity 

 separate into irregular groups leaving bare 

 spaces, serrate or spinulose at the top; mi- 

 crospores more numerous on emersed plants, 

 22-40//, ashy, papillose. 



Growing in mud flats, East Kingston, New 

 Hampshire. 



[Vol. 1: p. 47-] 5b. Isoetes Eatoni 



Dodge. Eaton's Quillwort. 



(Fig. 1 06b.) 



Isoetes Eatoni Dodge, Ferns and Fern Allies of 



New Eng. 39. 1896. 



Amphibious from a large trunk i / -2 / to i / - 

 4' in diameter. Leaves of the submerged 

 plant 20-200, varying in length up to 28', 

 marked with an elevated ridge on the ven- 

 tral side; leaves of the emersed plant shorter, 

 3-6; stomata abundant; peripheral bast bun- 

 dles irregular in occurrence or often wanting; 

 velum covering 1-4 of the sporange, polyg- 

 amous; sporanges large, 0.4' by o. I5 / , pale 

 spotted; macrospores small, 300-400// in diam- 

 eter, marked witk convolute labyrinthine, 

 ridges and cristate on the angles of the. inner 

 face ; microspores 25-30,// in diameter, smooth 

 or slightly papillose. 



In mud flats, East Kingston and Epping, New 

 Hampshire. 



[Vol. 1: p. 47.] 5c. Isoetes 



foveolata A. A. Eaton. Pitted 



Quillwort. (Fig. 106c.) 



Isoetes foveolata A. A. Eaton; Dodge, Ferns 

 and Fern Allies of New Eng. 38. 1896. 



Amphibious from a bilobed or rarely 

 trilobed base. Leaves 15-70, stout, 2 / -6 / 

 long, pinkish even when dry, or rarely 

 dark green; stomata scattered, found only 

 near the tips; no peripheral bast bundles; 

 monoicous or becoming dioicous; velum 

 covering 1-4 or 1-3 of the sporange; ligule 

 round-ovate; sporanges thickly sprinkled 

 with dark cells which are often collected 

 in groups; macrospores 380-560//, covered 

 beneath -with very thick-walled reticula- 

 tions, the openings appearing like little 

 pits ; reticulations elongate on the upper 

 surface of the spore; microspores dark 

 brown, 22-35// long, densely reticulate 

 and usually slightly papillose. 



In muddy banks of the Pautuckaway river, Epping, N. H., also at East Kington of the same state. 



