Phormidium durum N.L.Gardner

  • Filed As

    Phormidiaceae
    Phormidium durum N.L.Gardner ( type )

  • Collector(s)

    J. N. F. Wille 746, 29 Jan 1915

  • Location

    Puerto Rico. Hacienda Catalina near Palmer.

  • Specimen Notes

    Mounted with the type Wille 746 (barcode 00953289), and the paratype Wille 649 (barcode 00953290).

  • Identifiers

    NY Barcode: 00953288

    Occurrence ID: cdb0da79-e61e-494a-8bf0-e77ceced5284

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THE NEW YORK BOTANICAL GARDEN

DARIUS OGDEN MILLS FUND

FRESH WATER ALGAE OF PORTO RICO NEW YOR&.
COLLECTED BY PROFESSOR N. WILLE BOTANICAL
Humacao January 20-24, 1915

CARDEN

FRANCIS DROUET £ yj

NEW YORK
BOTANICAL
GARDEN

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Phormidium durum sp. nor.

Plate 9, figure 88

Filaments aggregated into a loose, fioccose stratum, long,
ftexuous, rigid ; trichomes 12-14 n diam., neither constricted at
the dissepiments nor attenuated at the apices; cells quadrate to
2 times as long as the diameter, homogeneous to finely granular
when old, pale purplish-gray; cross-walls thin but very distinct;
apical cell rounded, not capitate; sheath hyaline, changing to
reddish brown, when old, homogeneous, smooth, rigid, 2-3 n
diam.

Growing in flocculent masses among moss on shaded rock
near the Hacienda Catalina, near Palmer, no. 746, type; on
weathered rock near Humacao, no. 649. This latter collection
seems to belong to the same species as no. 746 but is older and
the sheath thicker. '

THE NEW YORK BOTANICAL GARDEN

DARIUS OGDEN MILLS FUND

FRESH WATER ALGAE OF PORTO RICO
COLLECTED BY PROFESSOR N. WILLE
Hacienda Catalina near Palmer Jan. 29-feb. 1, 1915

No

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Phormidium durum, Gardner [TYPE]

NEW YORK BOTANICAL GARDEN

00953288

?Auf" schattigen Felssn 29 Jan•

Determined by Francis Drouet

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N YORK

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ments, due to the nature of the sheath. The sheath seems to per-
sist for some time after the death and decay of the trichome.

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88. Phormidium durum

Terminal portion of a single typical filament............ x500

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THE NEW YORK BOTANICAL GARDEN

DARIUS OGDEN MILLS FUND

FRESHWATER ALGAE OF PORTO RICO -------

COLLECTED BY PROFESSOR N. WILLE /'	_

HACIENDA CATALINA NEAR PALMER	JAN. 29-FEB. 1, HStSt

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(Type «

®	FRANCIS DROUET	yy ^

NEW YORK
BOTANICAL