Stigonema compactum N.L.Gardner

NEW YORK.
BOTANICAL
GARDEN

0 1

cm

6 7 8 9 10 xt v

The New York
copyright reserved botanical Garden

r* ' % ' <? '

IE.** *“**•- ' ,
T&i. -• ' 1

NEW YORK BOTANICAL GARDEN

EX

FARLOW HERBARIUM, HARVARD UNIVERSITY

FLORA OF CHINA

FUKIEN PROVINCE New yore

No. A. 420	90TANIGAI

GARDE*'

Stigoneraa Gardner! De Toni

(- S. compactum Gardner Type, det G.)

Coll. H. H. Chung
Det. Francis Drjiet

00945477

Kushan near Foochow
Sept. 1926.

Stigonema compactum, Gardner, sp. nov.

Univ.Calif.Publ.Bot.l4îl0.pl.1. f.9* 2? S 192?.

Plants associated into a very dense , compact
stratum of indefinite expanse, 1-1.4 mm. thick;
filaments sparsely branched,straight, or slightly
sinuous, 6-7 V diam. , standing perpendicular uo
the substratum and parallel with each other, form-
ing a palisade layer, loosely agglutinated; branches
strict; heterocvsts sparse and inconspicuous; cells
sub spherical to" compressed, uniseriate, 3.5-^.5 p.
diam"., aeruginous; cell walls hyaline, homogeneous;
hormogonia apical, 7-10 cells long.

Forming a deep blue-green layer on eartn.

Kushan, near Foochow, China. Type, Chung, no. A42C,
in the Farlow Herbarium, Harvard University,
Cambridge, Mass.

The individual filaments of this species of
Stigonema very closely resemble those of certain
forms of S. hormoides. It also resembles the im-
perfectly described Sirosiphon velutinus Kuetz.

Its habit of growth is unique for the genus, the
filaments being perpendicular to the substratum,^
parallel with each other, and very closely associat-
ed, forming a continuous agglutinated stratum. The
hormogonia are at the free ends of the xilaments on
the surface of the stratum.

00945477