Fissidens curvatus |
Fissidens subbasilaris |
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fissidens moss |
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Habit | Plants 1.2–10 × 1–2.5 mm. | Plants to 12 × 1.5–3.5 mm. |
Stem | unbranched and branched; axillary hyaline nodules present; central strand weak or absent. |
branched; axillary hyaline nodules absent; central strand present. |
Leaves | as many as 25 pairs, narrowly lanceolate to ovate–lanceolate, acute to sharply acute to short acuminate, to 1.9 × 0.3; dorsal lamina narrowed proximally, ending before or at insertion, infrequently ± decurrent; vaginant laminae 1/2–4/5 leaf length, ± equal, minor lamina ending on or near margin; margin entire, limbate on all laminae, limbidium confluent at apex or ending shortly before apex, extending to base of dorsal lamina, limbidial cells 2–3-stratose; costa percurrent to excurrent, bryoides-type; laminal cells 1-stratose, distinct, smooth, ± bulging, firm-walled, elongate, 7–22 × 4–13 µm, increasing in size toward proximal part of leaf. |
as many as 28 pairs, sometimes ± undulate, oblong, obtuse-apiculate to acute, to 2.4 × 0.3–0.4 mm; dorsal lamina narrowed proximally, ending before or at insertion; vaginant laminae 1/2–2/3 leaf length, acute, ± unequal, minor lamina ending near margin; margin evenly crenulate-serrulate but irregularly serrate distally; costa ending 6–16 cells before apex, covered and obscured above by chlorophyllose cells, taxifolius-type; lamina cells irregularly 2-stratose, smooth, bulging, firm-walled, irregularly rounded-hexagonal, 7.5–10 µm. |
Seta | to 12 mm. |
1.5–5.5 mm. |
Sexual condition | rhizoautoicous; perigonia gemmiform, proximal to infertile and fertile stems. |
gonioautoicous and cladautoicous; perigonia gemmiform, axillary, and on short branches; perichaetia on short axillary branches near proximal ends of stem. |
Capsule | theca exserted, ± erect, radially symmetric to inclined, arcuate, bilaterally symmetic, 0.35–1.25 mm; peristome bryoides-type; operculum 0.25–0.3 µm. |
theca 0.8–2.1 mm, erect, radially symmetric or nearly so; peristome taxifolius-type; operculum long rostrate, 0.6–0.9 mm. |
Calyptra | cucullate, smooth, 0.5 mm. |
cucullate, smooth, 1.5 mm. |
Spores | 11–18 µm. |
13–18 µm. |
Sporophytes | 1 per perichaetium. |
1 per perichaetium. |
Fissidens curvatus |
Fissidens subbasilaris |
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Habitat | Bare, shaded soil, often among grasses in open Quercus forests and around bases of coastal shrubs | Particularly around bases of trees, also rocks, mostly limestone, infrequently decaying wood |
Distribution |
CA; Mexico; South America; West Indies; Europe; Asia; Africa; Pacific Islands (New Caledonia, New Zealand); Australia |
AL; AR; FL; GA; IA; IL; IN; KS; KY; LA; MA; MD; ME; MI; MO; MS; NC; NH; NY; OH; OK; PA; SC; TN; TX; VA; WI; WV; ON; QC; Mexico (San Luis Potosí, Tamaulipas)
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Discussion | Fissidens curvatus is distinguished by its delicate dimorphic stems, usually long excurrent costa, limbidium confluent at leaf apex, and slightly elongate laminal cells. The theca is usually arcuate but can also be erect. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Fissidens subbasilaris is distinguished, even in the field, by a costa obscured by chlorophyllose cells distally, and short perichaetial branches in the axils of proximal leaves. The plants are typically dark-green and often tinged with red. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 27, p. 347. | FNA vol. 27, p. 342. |
Parent taxa | Fissidentaceae > Fissidens | Fissidentaceae > Fissidens |
Sibling taxa | ||
Synonyms | F. milobakeri | |
Name authority | Hornschuch: Linnaea 15: 148. (1841) | Hedwig: Sp. Musc. Frond., 155, plate 39, figs. 6–9. (1801) |
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