Phormidium calidum var. olivaceum N.L.Gardner

• Region

  West Indies

• Country

  Puerto Rico

• Locality

  7 km east of Coamo, on rocks

• Coordinates

  18.0799, -66.2953

• Geodetic Datum

  WGS84

• Distribution

  Map all specimens of this taxon

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TYPE

NEW YORK
BOTANICAL GAROENBOTANICAL

GARDEN

THE NEW YORK

'x	DARIUS OGDEN MILLS FUND

FRESHWATER ALGAE OF PORTO RICO
OLLECTED BY PROFESSOR N. WILLE
SEVÉN KM. EAST OF COAMO	MARCH 20, 1915

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Phormidium calidum olivaceum var. nov.

*

Filaments scattered among other algae, not forming a deii-
nite stratum, relatively short, flexuous, 7-8 m diam; trichomes
5.8-G.8 n diam., straight at the apices and not attenuated, or 1-2
apical cells slightly attenuated and uncinate, capitate, frequently
interrupted in the sheath; cells quadrate to one-third diam. long,
homogeneous, dark olive-green or grayish green; sheath very
thin, smooth, homogeneous, hyaline.

Growing on rocks among Hepaticae, and in association with
other algae, about seven kilometers east of Coamo, no. 1870 e.,

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The above-diagnosed variety of P. calidum Gomont may be

*—’ %/

distinguished by the interrupted character of the trichome,
which in some specimens is broken into numerous parts which
gravitate some distance from each other, by the darker color,
and by the less pronounced capitate apical cells.

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Detennined by Francis Drouet