. British ferns and their varieties. acutelypointed, and the varieties are generally proliferous. The term acutilobum has been substituted for proli/erum, so many otherforms bearing bulbils. (See Appendix No. LXXVI). Acuto-gracile (Plate XXIX).—Found near Ottery St. Mary byMr. G. B. Wollaston ; a dwarf form with acutely pointed pinnules. Alatum (Plate XXIX).—A remarkable form, the normal wedge-shaped bases of the pinnules being much widened at point of attach-ment so as to form a continuous wing connecting them. Brachiatum.—Found in Devon by Mr. Hillman ; this form isvery wide at the base, the
. British ferns and their varieties. acutelypointed, and the varieties are generally proliferous. The term acutilobum has been substituted for proli/erum, so many otherforms bearing bulbils. (See Appendix No. LXXVI). Acuto-gracile (Plate XXIX).—Found near Ottery St. Mary byMr. G. B. Wollaston ; a dwarf form with acutely pointed pinnules. Alatum (Plate XXIX).—A remarkable form, the normal wedge-shaped bases of the pinnules being much widened at point of attach-ment so as to form a continuous wing connecting them. Brachiatum.—Found in Devon by Mr. Hillman ; this form isvery wide at the base, the lower pinnas expanding almost intofronds; several types of this have been found by others forminga very distinct section. (See Appendix No. LV and LVII). Brachiato-cristatum Keall.—Fronds branch into three fromthe bottom, forming a trident, such terminal bearing a bunch crest. Capitosum.—Found by Mr. Moly at Tatworth ; narrow-frondedgrandiceps. Conchatum.—Found by Mr. Moly at Hawkhouse;pinnules. shell-like ?fp&.l. PLATE XXIXPolystichum annulare var Polystichum annulare vaca latum THE POLYSTICHUMS 195
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