3. Forsstroemia S.O. Lindberg   残齿藓属   can chi xian shu

Öfvers. Förh. Kongl. Svenska Vetensk.-Akad. 19: 605. 1863.

 

Plants slender to rather robust, green, yellowish green or brown. Primary stems creeping; secondary stems loosely or pinnately branched; central strand absent; paraphyllia absent; pseudoparaphyllia foliose or filamentous; axillary hairs 7-cells long, with 4 brownish basal cells, upper 3 cells hyaline. Stem leaves loosely appressed or imbricate when dry, erect-spreading when moist, oblong-ovate, concave, shortly acute or narrowly acuminate; margins slightly recurved, serrulate at the apex; costae short, slender or thick, single or forked, reaching mid-leaf or beyond; leaf cells evenly thick-walled, smooth; median cells elliptical to narrowly rectangular; basal juxtacostal cells elongate; alar cells irregularly hexagonal or nearly quadrate, numerous; branch leaves similar to stem leaves, but smaller. Autoicous, rarely dioicous. Inner perichaetial leaves large, sheathing at the base, long acuminate at the apex; costae absent. Setae short, smooth, red; capsules immersed or exserted, cylindrical, erect, brown to reddish brown, smooth; opercula conic at the base, shortly rostrate; annuli absent; stomata few; peristome double; exostome teeth narrowly lanceolate, yellow, rarely reddish brown below, hyaline, densely papillose above; endostome segments reduced or absent. Calyptrae cucullate, hairy or naked. Spores spherical, papillose.

 

1. Leaf cells isodiametric or shortly oblong; costae strong, single........................................................................ 2

1. Leaf cells rhomboidal or linear; costae slender, single or double....................................................................... 4

2. Autoicous; sporophytes common; leaves gradually acuminate above........................................ 5. F. producta

2. Dioicous; sporophytes rare; leaves slenderly acuminate above....................................................................... 3

3. Leaves usually more than 1 mm long, often twisted near the apex; apical leaf cells longer than median leaf cells..................................................................................................................................................................................

3. Leaves less than 1 mm long, not twisted near the apex; apical and median leaf cells similar...................... 1. F. cryphaeoides

4. Autoicous, sporophytes common............................................................................................ 6. F. trichomitria

4. Dioicous, sporophytes rare................................................................................................................................. 5

5. Plants densely pinnately branched; costae single, reaching mid-leaf, rarely double.............. 3. F. neckeroides

5. Plants irregularly pinnately branched; costae single or double, ending below mid-leaf.............. 4. F. noguchii