Irene cubitorum F.Stevens & Tehon

2 3
The New York
copyright reserved botanical
Garden
No. '¿lO^
Determined by
Host
Locality
FUNGI OF BRITISH GUIANA
Collected by F. L. Stevens
^ \ e». . ^ :
1922
botanical garden
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No. I *1
Determined by
Host ¡£^;
Locality
FUNGI OF BRITISH GUIANA
Collected by F. L. Stevens
Date T — / Í)
1922
newyorkbotanical garden
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HERBARIUM DF
THE NEW YORK BDTANICAL GARDEN
FUNBI OF BRITISH «WMHA
HERBARIUM OF
THE NEW YORK BDTANICAL GARDEN
fungidp BRITISH GUIANA
810. Irene cubitorum Stevens & Tehon
TYPE
On Dimorphandra latifolia
Coverdon, British Guiana
Aug. 8, 1922
Collected by F.L.Stevens
DETERMINED BY
1*17 • Irene cubitorum Stevens & Tehon
On Dimorphandra latifolia
Demefcara - Essequibo Railroad, British Guiana
July 15, 1922
Collected by F.L.Stevens
Determined by
NEW YORK BOTANICAL GARDEN
01041502
NEW YORK BOTANICAL GARDEN
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r
HERBARIUM DF
THE NEW YDRK BDTANICAL GARDEN
fungi OF BRITISH GUIANA
380*Irene cubitorum Stevens & Tehon
On Dimorphandra sp.
Demerara -Esseqjuibo Railroad, British Guiana
July 15, 1922
collected by F.L.Stevens
DETERMINED BY
NEW YORK BOTANICAL GARDEN
t
01041505
igt tq >lyz&
26. Irene cubitorum Stevens & Tehon, n. sp.
Colonies hypophyllous, usually circular, 0.5 cm. in diameter
or more. Mycelium very crooked, making a well-defined angle
at each cell juncture, the diameter usually increased at the cell
unions, and the wall extended outward to form a pointed projec-
tion; hyphae 7-9.5 n wide; branching both alternate and oppo-
site. Capitate hyphopodia alternate; head cells irregularly
angular, about 14 ¡x long; basal cells variable in length, from 3
to 10 ¡x or more long. Mucronate hyphopodia alternate, irregu-
lar, but mostly bottle-shaped, about 20 ¡x long. Setae none.
Perithecia flat when young, globular when mature, rough, 107—
152 ix in diameter. Asci 2-spored, evanescent. Ascospores
brown, obtuse, constricted at the septa, 4-septate, 44-54 X 12-
17 ix. (Pl. 2, Fig. 24.)
Group No. 3101-5220.
On Dimorphandra latifolia.
British Guiana: Coverden, August 8, 1922^No.(#7o)(type);
Demerara-Essequibo Railroad, July 15, No.(417/	>
On Dimorphandra sp.
British Guiana: Demerara-Essequibo Railroad, July 15, No.
A startlingly unique appearance is possessed by this species
when viewed under the low power of the microscope, for the close
intermingling of the hyphae, together with the characteristic
angling, reminds one of a wire netting. The species is not similar
to any hitherto described on a leguminous host; though it is
closely resembled by the smaller, more delicate Irene cubitella,
described in this paper. In Beeli’s key it comes just before M.
calva Speg., with which, however, it could not possibly be con-
fused.
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