Groutiella macrorrhyncha (Mitt. ex Bosch & Sande Lac.) Wijk & Margad.

Yu, Ning-Ning & Jia, Yu, 2023, A world revisionary study of the genus Groutiella Steere (Orthotrichaceae, Bryopsida), Cryptogamie, Bryologie 20 (7), pp. 161-182 : 170-174

Groutiella macrorrhyncha (Mitt. ex Bosch & Sande Lac.) Wijk & Margad.

( Fig. 8 )

Taxon 9: 51 ( Wijk & Margadant 1960).

Micromitrium maracaibense Broth., Mitteilungen aus dem Institut für allgemeine Botanik in Hamburg 8: 403 ( Brotherus 1931).

— Groutiella maracaibensis (Broth.) B.H. Allen & Goffinet, Monographs in Systematic Botany from the Missouri Botanical Garden 90: 544 ( Allen 2002).

— Type: Venezuela. Maracaibo, E. von Jess s.n. (syn-, H!), syn. nov.

SPECIMENS EXAMINED. — Costa Rica. Alajuela, Monte Verde, McQueen 5048A (MO) ; Cartago, Tapantí Forest Reserve, Griffin & Eakin 019960 (MO).

Indonesia. Java, 1906, Pamplin s.n. (syn-, NY).

Nicaragua. Matagalpa, Hamonia, I. Granzow de la Cerda 11611 ( MO).

Panama. Cerro Colorado, Allen 5349 ( MO).

Venezuela. Maracaibo, E. von Jess s.n. (syn-, H).

DISTRIBUTION AND HABITAT. — The tropical region of America; Indonesia Islands (Java). On bark of tree trunks, upper branches, and twigs; 1000-1500 m.

DESCRIPTION

For description, seeMitten 1860; Brotherus 1931; Allen 2002.

COMMENTS

G. maracaibensis was published by Brotherus in 1931, as Micromitrium maracaibense Broth. and transferred to Groutiella by Allen and Goffinet in 2002.Mitten published Macromitrium macrorrhynchum Mitt. ex Bosch & Sande Lac. (accepted name: Groutiella macrorrhyncha , fide Wijk & Margadant 1960) in 1860 based on the “oblongo-lingulata” leaves and the excurrent costa. The characters of the type specimen from NY display Groutiella macrorrhyncha leaves as oblong-lanceolate with excurrent costa, with gradually acute to acuminate apices, which areidentical to G. maracaibensis . In this paper, Groutiella maracaibensis is synonymised under G. macrorrhycha . After this treatment, G. macrorrhycha distributes in both New and Old world continents. G. tomentosa (Hornsch.) Wijk & Margad. is another species in this genus distributed pantropically.

Groutiella macrorrhyncha has lanceolate leaves with stoutly excurrent costae, and are clearly crispate when dry. There is a variation in the apices of G. macrorrhyncha where the apices are only gradually acute (e.g. Griffin et al. 19960, D’Acay 6481), or acuminate (e.g. Allen 5349).

Groutiella chimborazensis has lanceolate leaves with short acuminate apices and crispate when dry, so it is difficult to distinguish it from G. macrorrhyncha in habit. However, G.chimborazensis differs from G. macrorrhyncha in the percurrent costa or costa almost ending below the apex ( Fig. 6G ), while G. macrorrhyncha has an excurrent costa ( Fig. 8J ).

Figures

FIG. 8. — Groutiella macrorrhyncha (Mitt. ex Bosch & Sande Lac.) Wijk & Margad.:A, plant;B, branches with capsule;C, cross section of stem; D, portion of cross section of stem; E-I, leaves; J, apical leaf cells; K, maginal leaf cells. All from Pamplin s.n., syntype of G. macrorrhyncha, NY. Scale bar: A, 1.7 cm; B, 5 mm; C, E-I, 0.4 mm; D, 100 µm; J, 53 µm; K, 160 µm. Credits: Yu N.-N.

FIG. 6. — Groutiella chimborazensis (Spruce ex Mitt.) Florsch.: A, plant; B-D, median leaves; E, F, basal leaves; G, apical leaf cells; H, basal leaf cells; I, J, perichaetial bract;K, L, capsule;M, phaneropore;N, portion of peristome;O, spores.All from Pringle 10560 (MO),isotype of Macromitrium undosum Card.Scale bar: A, 1 cm; B-F, I, J, 1.15 mm; G, H, 55 µm; K, L, 1.8 mm; M-O, 232 µm. Credits: Yu N.-N. & Guo M. S.