01055nas a2200145   4500008004100000245007600041210006900117260001200186300001600198490000700214520054100221100001300762700001800775856011600793       1983                        eng d00aSpore morphology and taxonomy of Isoetes in northeastern North America.0 aSpore morphology and taxonomy of Isoetes in northeastern North A  c1983///  a3140 - 31630 v613 aTaxonomy of Isoetes largely rests on megaspore and microspore wall ornamentation and spore size. These characters are reevaluated and the range of their variability is described (SEM photographs). Eight species of Isoetes are recognized for NE North America: I. macrospora, I. hieroglyphica, I. tuckermanii, I. riparia, I. acadiensis, I. echinospora, I. eatonii and I. engelmannii. Each species is provided with a revised list of synonyms, description, ecological notes and distribution maps. A key to species is provided. -from Authors1 aKott, L.1 aBritton, D.M.  uhttp://www.scopus.com/inward/record.url?eid=2-s2.0-0020901416&partnerID=40&md5=1639339936055b4de2712b81625e2497