Selaginella hansenii
Selaginella braunii
Hansen's spike-moss
Braun's spike-moss
not readily fragmenting, prostrate, upperside and underside structurally different, irregularly forked, branches determinate, tips upturned.
erect, highly branched, branches 4-forked, flat, not articulate, hispid.
with underside leaves slightly longer and narrower than upperside leaves, otherwise monomorphic, not clearly ranked, tightly appressed, ascending, green or green with red spots, or reddish, linear-lanceolate (underside) to linear-triangular (upperside), (2–)3–4.5 × 0.5–0.6 mm;
abaxial ridges present;
base abruptly adnate, pubescent (sometimes glabrous);
margins ciliate, cilia white to white opaque, strongly appressed and ascending, 0.03–0.1 mm;
apex with bristle white to white-opaque, 0.5–1.4 mm (those on underside leaves sometimes 1/4–1/2 longer than those on upperside leaves).
rugose.
solitary, 5–7 mm;
sporophylls ovate-deltate to ovate-triangular, abaxial ridges not prominent, base glabrous, margins short-ciliate, apex bristled.
solitary, 2–8 mm;
sporophylls monomorphic, cordate to deltate-ovate, base glabrous, margins green, slightly crenate, apex cuspidate to acuminate.
borne on upperside of stems, throughout stem length, 0.25–0.45 mm diam.
not seen.
leaves distant, green, ovate-oblong, 2–2.5 × 0.7–1 mm;
base truncate, basiscopically forming very short wing;
margins green to slightly transparent, usually revolute, crenate;
apex obtuse to rounded.
leaves lanceolate-oblong to asymmetric, 2–3 × 1 mm;
base peltate, rounded;
margins green to slightly transparent, usually revolute, crenate;
apex long-acuminate.
= 20.
Selaginella hansenii
Selaginella braunii
Leaf dimorphism in Selaginella hansenii is only slightly and inconsistently expressed; the upperside leaves tend to be more lanceolate, short, and slightly thick, whereas the underside leaves tend to be more linear, longer, and thinner, but in some specimens the leaves are monomorphic. Red leaves are rare within Selaginella subg. Tetragonostachys, otherwise found in the flora only occasionally in S. rupestris. Such leaves are more common in S. steyermarkii Alston from southern Mexico and Guatemala and S. sartorii Hieronymus from Mexico.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Selaginella braunii is cultivated in greenhouses, nurseries, and gardens mainly in Florida, Georgia, Louisiana, and Texas. It is related to S. ostenfeldii Hieronymus of Thailand, Burma, and Indochina, and to S. mairei H. Leveillé, also from Burma and from Indochina.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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