The Polytrichacea of Western North America

Cover The Polytrichacea of Western North America
The Polytrichacea of Western North America
Theodore C Theodore Christian Frye
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48, t. 8.
Name derived from aliger = wing; referring to the conspicuous lamellae on the back.
Plants dioicous, loosely caespitose, gregarious; male plants shorter, proliferous from the center of the antheridial disk. Stems 13 cm. Tall, slender, radiculose at base.
Fig. 6. Oligotrichum aligerum.
1 = Antheridial plant; d = antheridial disk through which the stem has grown. 2 = Plant T7ith capsule. 3 = Capsule. 4 = Calyptra, with its few hairs. 5 = Hair of calyptra. 6 = Peristome. 7 = Leaf, showin
...g lamellae on upper surface. 8 = Leaf-tip. 9 = Cross section of leaf showing lamellae. (After Sullivant).
Leaves open or spreading, oblong-lanceolate, smooth, blunt, pointed, with lamellae on both sides. Margin plane, entire at base- short-dentate above middle. Lamellae on upper side 5 7, 5 wavy from side to side; lamellae on back 6 8, high, dentate. Vein per- B Brotherus, in Engler & Prantl: Die naturlichen Pflanzenfamilien, Teil. I, Abt. 3 s. 674, shows ii in a figure.
THE POLYTRICHACE^E OF WESTERN NORTH AMERICA current or vanishing, keeled.


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