. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. POLYPODIACEAE. Vol. I. jagged lobes, or deeply stellate, the filiform divisions concealed beneath the sporanges or inflexed and partially covering them. [Named in honor of Joseph Woods, 1776-1864, an English architect and botanist.] About 25 species, mainly of temperate or cold regions. Besides the following, another occurs in the southwestern United States. Ty
. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. POLYPODIACEAE. Vol. I. jagged lobes, or deeply stellate, the filiform divisions concealed beneath the sporanges or inflexed and partially covering them. [Named in honor of Joseph Woods, 1776-1864, an English architect and botanist.] About 25 species, mainly of temperate or cold regions. Besides the following, another occurs in the southwestern United States. Type species: Polypodium ilvense L. Indusium small or inconspicuous, the divisions narrow or filiform. Stipes jointed near the base; filiform divisions of the indusium more or less inflexed over the sporanges. Blades with more or less rusty chaff underneath. 1. W. ilvensis. Blades glabrous or nearly so. Blades oblong-lanceolate ; divisions of the indusium numerous. 2. W. alpina. Blades linear or linear-lanceolate; divisions of the indusium few. 3. W. glabella. Stipes not jointed; divisions of the indusium spreading, mostly concealed beneath the sporanges. Puberulent, usually hispidulous; indusium deeply cleft into narrow flaccid segments. 4. IV. scopulina. Glabrous ; indusium divided to the center into a few short whitish turgid beaded hair-like segments. 5. W. oregana. Indusium ample; the divisions broad, early spreading. 6. W. obtusa. i. Woodsia ilvensis (L.) R. Br. Rusty Woodsia. Fig. 23. Acrostichum ilvense L. Sp. PI. 1071. 1753- Woodsia ilvensis R. Br. Prodr. Fl. Nov. Holl. 1: 158. 1810. Rootstocks short, ascending, growing in masses, the leaves closely caespitose. Stipes short, stoutish, jointed near the base, rusty chaffy with narrow filiform scales; blades lanceolate, 4'-io' long, pinnate, nearly glabrous above, more or less covered with rusty chaff beneath; pinnae crowded, sessile, pinnately parted, the crowded segments oblong, crenate; sori borne near the margins of the
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
