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Published In: Die Natürlichen Pflanzenfamilien I(3): 428. 1902. (Nat. Pflanzenfam.) Name publication detailView in Biodiversity Heritage Library

Project Name Data (Last Modified On 2/15/2011)
Acceptance : Accepted
Project data     (Last Modified On 2/15/2011)
Discussion: The short tumid stems of A. hamulus are unlike any other Central America species of Pottiaceae and they give the plants the field aspect of a small Pogonatum species. The densely hairy calyptra and polytrichaceous peristome of Pogonatum technically distinguish it from A. hamulus. Sterile collections of Pogonatum differ from A. hamulus in having leaves with lamellae rather than filaments, acute apices, and plane to erect leaf margins. Aloina hamulus is similar to the Mexican A. aloides (Schultz) Kindb. var. ambigua (B.S.G.) Craig and A. apiculata (Bartr.) Delg. from Jamaica. The former species is distinguished from A. hamulus by its long-ligulate leaves, smooth costa, longer peristome teeth (to 1.2 mm) and larger spores (13–24 μm). Aloina apiculata differs from A. hamulus in having lingulate-lanceolate leaves with an open, apiculate apex and short-excurrent costa. The specific epithet hamulus (a small hook or barb) is a noun in apposition and not required to agree in gender with the generic epithet Aloina.
Illustrations: Bartram (1949, Fig. 62 E–H); Delgadillo (1975, Figs. 13–17); Reese (1984, Fig. 29 M–N); Zander (1993, Pl. 76 1–4); Sharp et al. (1994, Fig. 271 h & i). Figures 5 & 6.
Habitat: On soil, dry bluff, and adobe walls; 1524–1533 m.
Distribution in Central America: GUATEMALA. Huehuetenango: Hermann 26320 (F, NY); Quezaltenango: Bernoulli & Cario 118 (FH, NY); Sacatepéquez: Svihla 2798 p.p. (FH, mixed with Pseudocrossidium replicatum). EL SALVADOR. La Libertad: Chapman B-7 (MICH).
World Range: North-Central, South-Central, and Southeastern U.S.A.; Mexico; Central America.


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Aloina hamulus (C. Müll.) Broth., Nat. Pflanzenfam. 1(3): 428. 1902.

Barbula hamulus C. Müll., Bull. Herb. Boissier 5: 192. 1897. Aloinella hamulus (C. Müll.) Bartr., Bryologist 49: 114. 1946. Protologue: Guatemala. Quezaltenango, inter Barbula perlinealem vigens. Coll. [Bernoulli & Cario] N° 118 (FH, NY).

Plants small, brownish green to yellowish green, scattered or in small tufts, to 4 mm high. Stems reddish yellow, erect, not branched, rhizoids scattered, sclerodermis and hyalodermis absent, central strand present. Axillary hairs 5–6 cells long, all cells hyaline. Leaves 0.6–2.0 mm long, lingulate, erect-incurved when dry, erect when wet, cucullate, lamina bistratose near costa; margins entire to irregularly crenulate, strongly infolded above; costa percurrent to subpercurrent, coarsely papillose at back above, guide cells and single (dorsal) stereid band well-developed, ventral surface layer differentiated as uniseriate, branched filaments 3–7 cells long, filament cells thin-walled, cylindrical to spherical; upper cells rectangular, elliptic or transversely elongate, 9–26  x 8–13 μm, thick-walled, smooth, basal cells quadrate to rectangular, thin-walled, smooth, 13–60 μm long, hyaline, alar cells not differentiated. Dioicous. Perichaetia and perigonia terminal; perichaetial leaves not differentiated. Setae smooth, 12–15 mm long, red. Capsules cylindrical, erect, 2.5–3.0 mm long, smooth; exothecial cells rectangular, thin-walled; stomata in neck; opercula slightly inclined, conic-rostrate, 1 mm long; annuli persistent, of 2 layers of vesiculose cells; peristome yellow, basal membrane short, teeth erect or once twisted, to 1.0 mm long, spiculose. Spores 8–13 μm, finely papillose. Calyptrae cucullate, smooth, 2.5 mm long.


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