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pretty uniformly twelve. The spores are yellowish, oblongreniform
with flattish sides, which meet at the concave side,
and there form a thin and very narrow wing. The surface of
the spore is covered with very minute slightly-elevated roundish
areolations, like the rind of an orange on a greatly-reduced
scale.
While in var. intermedium this species makes an inconveniently
near approach to P . vulgare, in var. Kaulfussii it
shows quite as close an affinity to several species of the section
Goniophlebium, especially to P. Catharinee of Langsdorff
& Fischer (Ic. F il, p. g, t. 9).
It may be noticed in this connection that Milde says of
the veinlets of P. vulgare, var.' serratum, " Interdum ramos
anastomosantes in venii’
Plate X X X I , Figs. 4, 5 . — Polypodium Californicum, The frond
selecied for drawing was collected at San Diego by Mr. D. Cleveland,
and represents the var. intermedium. Fig. 5 is a portion of a segment
slightly enlarged, and shows the irregular character of the venation.
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