Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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SELAGINELLACEAE

SPIKE-MOSS FAMILY

Dieter H. Wilken

Plants on soil, rocks, or other plants, cespitose, mat-like (± flat), or cushion-like (rounded)
Stems pendent to erect, short to widely spreading, rooting at base or in branch fork; branches intricately intertwined or not
Leaves many, simple, overlapping, appressed, small, ± scale-like, 1-veined, smooth to grooved on back, sessile to decurrent, generally 4-ranked; fertile leaves at same node of prostrate stems equal or not, if unequal, leaves below stem generally appressed, leaves above stem ascending to spreading
Cones generally terminal; leaves like those on sterile stems or not, generally strongly overlapping, triangular in X -section
Sporangia 1 per leaf axil, spheric to reniform; lower generally with (1–3)4 large, 3-ridged, yellow to orange spores; upper generally with many, small, generally pale-colored spores.

SELAGINELLA

SPIKE-MOSS

The only genus
Species in genus: ± 700 species: worldwide, generally tropical and warm temp
Etymology: (Latin: small Selago , ancient name for some Lycopodium )
. Some cultivated as groundcover and curiosity (S. kraussiana, S. lepidophylla , resurrection plant). Hand lens required to observe leaf shape, margin, bristle at tip, cones
Horticultural information: TRY; DFCLT.

Native

S. densa Rydb. var. scopulorum (Maxon) Tryon

ROCKY MOUNTAIN SPIKE-MOSS

Plant mat- to cushion-like, ± open
Stems ± spreading to decumbent, 2–8 cm; lateral branches ascending to ± erect, 1–2.5 cm
Leaves: lower decurrent; upper sessile; upper and lower leaves of main stems unequal (lower > upper), 2–4 mm, linear to narrowly lanceolate, bristle-tipped, bristle < 1 mm, soft, margin sparsely ciliate to minutely dentate, hairs ascending
Cone generally 10–30 mm; leaves lanceolate to ovate
Ecology: UNCOMMON. Open, rocky sites, coniferous forest
Elevation: 1500–2200 m.
Bioregional distribution: n Klamath Ranges
Distribution outside California: to British Columbia, ND, n Mexico
Synonyms: S. engelmannii Hieron. var. s. (Maxon) Reed
See the CNPS Inventory for information about endangerment and rarity.
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bioregional map for SELAGINELLA%20densa%20var.%20scopulorum being generated
 
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Selaginella densa var. scopulorum
Retrieve dichotomous key for Selaginella
Overlay Consortium of California Herbaria specimen data by county on this map
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