Huperzia serrata (Thunb.) Trevis.
Descripción
Plants erect, long-decumbent at bases, 3–20 cm; stems mostly 12–16 cm tall, 1.5–2 mm diam. (without leaves), green, divisions isodichotomous, older portion of stems yellow, prominent annual constrictions from formation of shorter leaves at end of growing season, slight reduction of leaf size from juvenile portions to mature portions; leaves deflexed near stem bases, spreading toward stem tips, spirally arranged in many ranks, no stomata on adaxial surfaces, largest leaves narrowly obtrullate with apices abruptly acuminate (7–16 X 1–3.5 mm above middle), narrowed to petiole-like bases (0.8–1 mm wide), smallest leaves (at annual constrictions) obtrullate to lanceolate (3–6 X 0.75–1.25 mm above middle), narrowed to petiole-like bases (0.5–1 mm), deeply serrate, sometimes doubly so, with 5–15 large teeth curving towards tips; sporangia evident in zones, asexual 3-lobed propagules (gemmae) 4–4.5 X 3.5–4 mm produced at end of year’s growth on gemmiphores (short stems 3.5–5 mm with 6 pairs of leaves), spirally placed among leaves; 2n=528 (India).A
Forma de vida
TerrestreA
Ejemplar revisado
Hgo (Breedlove 59467, CAS, MEXU, UC; Guevara F. s.n., FCME; Nuñez F. s.n., 28 Nov 1980, FCME; Reyes R. s.n., FCME). Oax (Liebmann s.n. [Pl. Mex. 2027], C, NY, UPS, US).
A
A
Elevación
1200 – 2130 mA
Ecología y Hábitat
On Atlantic slope.A
Tipo de vegetación
Bosque de neblina/mesófilo, Bosque de pino-encinoA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
The major portion of this species’ range is in the Old World with disjunct, montane populations in wet forests of Mexico, Cuba, and Hispaniola. The type of Huperzia sargassifolia corresponds to Old World material of H. serrata. Large, serrate leaves exhibiting annual cycles of shorter leaves, and asexual gemmae (and gemmiphores that stay on the plant once the gemmae have been dispersed by rain or wind) are distinguishing characters of H. serrata.A