All Floras      Advanced Search
FNA Vol. 2 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 2 | Isoëtaceae | Isoëtes

Isoëtes tegetiformans Rury, Ann. Missouri Bot. Gard. 68: 100. 1978.

Mat-forming Melin's grass

Plants becoming terrestrial. Rootstock horizontally elongate, mat-forming, often proliferous. Leaves deciduous to nearly evergreen, bright green, pale toward base, distichously arranged, to 4 cm, pliant, gradually tapering to tip. Velum covering entire sporangium. Sporangium wall unpigmented. Megaspores dark gray, 275--370 μm diam., tuberculate with low and distinct tubercules; girdle obscure. Microspores brown in mass, 26--33 μm, spinulose. 2n = 22.

Spores mature late winter and spring. Shallow pools on granite outcrops; of conservation concern; Ga.

Isoëtes tegetiformans is a unique mat-forming quillwort distinguished by its distichous leaf arrangement, horizontally elongate rootstock, and nondichotomous roots. (See discussion under I. melanospora.)


Related Objects Image Gallery 
  • Illustration
  • Illustration
  • Distribution Map
  • Map

     |  eFlora Home |  People Search  |  Help  |  ActKey  |  Hu Cards  |  Glossary  |