5c. Fissidens bryoides var. lateralis (Broth.) Z. Iwats. & T. Suzuki 小凤尾藓侧蒴变种 xiao feng-wei xian ce shuo bian-zhong
J. Hattori Bot. Lab. 51: 363. 1982. Fissidens lateralis Broth., Hedwigia 38: 210. 1899. Type. Japan: Kiushu, Nagasaki, Wichura 1413a (lectotype H-BR).
Fissidens lateralioides Okam., J. Coll. Sci. Imp. Univ. Tokyo 38(4): 6. 1916.
small, light green to green. Leafy stems
3.1–12.0 mm long, 2.0–4.0 mm wide, simple or often with lateral short branches at median to upper parts; cortical stem cells small, thick-walled; central strand weakly differentiated; axillary hyaline nodules not differentiated. Leaves
in 5–15 pairs, upper stem leaves lanceolate to linear-lanceolate, 1.4–2.4 mm × 0.3–0.7 mm, acute at apex, wedge-shaped (rarely round) at base of dorsal laminae, rarely shortly decurrent; costa usually shortly excurrent; leaf margins almost entire, but weakly serrulate near apex; vaginant laminae 1¤2
the leaf length, usually nearly equal at upper ends; limbidia usually strong, 2–4 rows of cells on apical laminae, 3–6 rows on vaginant laminae, 1–3 cells thick; laminae 1 cell thick; cells of apical laminae irregularly hexagonal to quadrate, 7–14 µm long, moderately thick-walled, smooth, rarely more or less weakly mammillose; cells of vaginant laminae similar to those of apical laminae, but longer and larger toward the base. Autoicous
or polyoicous; male inflorescences bud-like, usually in axils of stem leaves, rarely terminal on stems; female inflorescences lateral (in axils of stem leaves), or terminal on stems, often terminal on short branches; archegonia often mixed with antheridia (synoicous), especially in terminal inflorescences; only one inflorescence found in each leaf axil; perchaetial leaves small for lateral female inflorescences, but larger for terminal synoicous inflorescences; archegonia 250–300 µm long. Setae
relatively short, 0.8–2.5 mm long, smooth; capsules symmetrical, urn 0.5–0.9 mm long; opercula rostrate, 0.4–0.5 mm long; exothecial cells rectangular with thicker longitudinal walls; peristome teeth similar to those of var. bryoides
, 0.4 mm long, 35–45 µm wide at base. Calyptrae
10–16(–21) µm in diameter, almost smooth.