Nostoc ellipsoideum N.L.Gardner

• Region

  West Indies

• Country

  Puerto Rico

• Locality

  on the rocks in the vicinity of Jayuya

• Coordinates

  18.2211, -66.5917

• Coordinate Uncertainty (m)

  9171.57

• Georeferencing Method

  Georeferencing Quick Reference Guide, Version 2012. Located coordinates of geogr. center of Jayuya. Measured from coord. to farthest extent of the municipality to find linear ext. (9160 m). Used MaNIS Georef. Calculator to find uncertainty (Bounded Area).

• Geodetic Datum

  WGS84

• Distribution

  Map all specimens of this taxon

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Determined by Francis Drouet

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Nostoc ellipsoideum sp. nov.

Thallus without definite form, usually flattened and irregular,
firm-gelatinous or cartilaginous up to 3 mm. diam.; trichomes
moderately tortuous, not densely congested, pale aeruginous,
deeply constricted at the dissepiments; cells cylindrical to nar-
rowly ellipsoidal, 1.4-1.8 p diam., quadrate to *2.2 times as’long
as the diameter, homogeneous; heterocysts dolioform, 2.4r-2.8 m
diam.; spores ellipsoidal, about 3 m diam., about 6 p long; tegu-
ment opalescent, changing to yellowish brown at maturity.

Growing on rocks in the vicinity of Jayuya, no. 1797, type.

Nostoc ellipsoideum appears to have its nearest affinities in
Humifusa section of the genus. The spores seem not to be quite
mature.

fiEVS/ YORK

BOTANICAL

)EN

THE NEW YORK BOTANICAL GARDEN

DARIUS OGDEN MILLS FUND

FRESH WATER ALGAE OF PORTO RICO
COLLECTED BY PROFESSOR N. WILLE
Jayuya March 15, 1915

00953542