[article]
| Titre : |
An unusual form of Huperzia selago (Lycopodiaceae) and its implications for gemma homology in the genus |
| Type de document : |
texte imprimé |
| Auteurs : |
Weston Testo, Auteur ; Lynden Gerdes, Auteur |
| Année de publication : |
2015 |
| Article en page(s) : |
pp. 123-126 |
| Langues : |
Anglais (eng) |
| Mots-clés : |
Huperzia |
| Résumé : |
"Uniquely among lycophytes, members of thegenusHuperzia(Lycopodiaceae) are characterized by the presence of asexualpropagules borne along the shoot axis. These are highly organized structuresconsisting of a base, known as the gemmiphore, that is six-leaved andpersistent, and an apical portion known as the gemma. This latter portioncomprises six decussately arranged, food-storing leaves enclosing a minuteterminal shoot. This apical portion disperses by abscission from thegemmiphore. These gemmiphore-gemmae structures (hereafter referred tosimply as ‘‘gemmae’’) are distributed along the plant’s main shoots and arethought to be dispersed by rain or wind. Gemmae are important in forming andmaintainingHuperziapopulations and contribute to the commonness ofinterspecific hybrids, which lack viable spores (Wagner and Beitel,inFlora ofNorth America. Editorial Committee, eds. 1993+Flora of North America Northof Mexico. New York and Oxford. 2:20–21. 1993; Reutter, Amer. Fern J. 77:50–57. 1987)." |
| Type de publication : |
périodique |
| Référence biblio : |
Testo W., Gerdes L., 2015 - An unusual form of Huperzia selago (Lycopodiaceae) and its implications for gemma homology in the genus. American Fern Journal, 105 (2) : 123-126. |
| DOI : |
10.1640/amfj-105-02-123-126.1 |
| Permalink : |
http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=66634 |
in American Fern Journal > vol. 105, n°2 (Année 2015) . - pp. 123-126
[article]
|
An unusual form of Huperzia selago (Lycopodiaceae) and its implications for gemma homology in the genus in American Fern Journal, vol. 105, n°2 (Année 2015)