Difference between revisions of "Grammitis"
J. Bot. (Schrader) 1800(2): 3, 17. 1802.
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| − | --><span class="statement" id="st- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>often less than 15 cm [rarely more than 50 cm]. <b>Blade</b> pinnatifid [simple to 1-pinnate or rarely more divided], bristly [or glabrous], glandless [or glandular]; setae dark reddish brown [to transparent]. <b>Veins</b> simple or 1-forked [to pinnately veined] in each segment, free, ending in hydathodes adaxially. <b>Sori</b> round [to oval or elongate], not forming a coenosorus, not sunken; paraphyses absent [or present]. <b>x</b> = 32, 33, 36, 37.</span><!-- |
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Revision as of 13:27, 27 July 2019
Plants often less than 15 cm [rarely more than 50 cm]. Blade pinnatifid [simple to 1-pinnate or rarely more divided], bristly [or glabrous], glandless [or glandular]; setae dark reddish brown [to transparent]. Veins simple or 1-forked [to pinnately veined] in each segment, free, ending in hydathodes adaxially. Sori round [to oval or elongate], not forming a coenosorus, not sunken; paraphyses absent [or present]. x = 32, 33, 36, 37.
Distribution
Tropical and subtropical, North America, South America, Asia, Africa, Pacific Islands, Australia.
Discussion
The total number of species is based on acceptance of a relatively broad circumscription. Our sole species belongs to the group (genus or subgenus) formerly called Xiphopteris, a name that is now treated as a synonym of Cochlidium (L. E. Bishop 1978). This group comprises perhaps 30 species and is defined by the following characteristics: stem scales not clathrate, often marginally bristly; veins simple or with a single acroscopic branch in each segment; blades linear, usually pinnatifid or pinnatisect; lack of a marginal black border around blade; one sorus per segment; and hydathodes present. It probably warrants generic status under the name Micropolypodium Hayata, a primarily neotropical genus with representatives in eastern Asia (Malaysia, China, Sikkim, Taiwan, and Japan).
Species ca. 300 or more (1 in the flora).