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var. GRACILESCENS Dismier. 
Tufts dense, green, with long slender stems, and small short leaves. 
Gaspe Co., Quebec. 
An extremely variable species, especially in gross appearance. 
The leaves may be short and abruptly acuminate, or oblong-lanceo- 
late and gradually acuminate with a long excurrent costa. While ap- 
proaching Ph. seriata the present species differs in the arrangement of 
the leaves and the shape of their apex. Ph. glabriuscula Kindb., 
Catl. Canadian PL Pt. 6: 107, belongs here according to some exam- 
ples of No. 578, Canadian Musci, but specimens from the original lo- 
cality distributed by Mr. J. Moser are Ph. caespitosa. 
8. PhilonoTIS FONTANA Brid., Bryol. Univ. 2 : 18. (1827). 
Lesq. & James, Manual. 209. (1884). 
Dixon & Jameson, Handbook. Ed. 2: 321. t. 40. J. 
(1904). (excl. varr. ) 
Bartramia font ana Brid., Mant. muse. 116. (1819). 
Bry. Eur. Monog. 18. t. 9. (1842). 
In dense tufts, stems erect, with subverticillate branches; stem 
leaves erect, more or less imbricate, slightly secund, concave, oval or 
cordiform-lanceolate, slenderly acuminate, strongly revolute to middle, 
1-2 plicate, teeth of margin in pairs; costa strong, broader at the base, 
more or less excurrent: areolation rectangular or rhomboidal, papillae 
in the lower angles; perigonial leaves oval triangular, the inner obtuse . — 
[Essai. 403.) 
Range: — Throughout North America, extending into Mexico. 
Polymorphous : like many mosses of similar habitat. The speci- 
mens in Sull. & Lesq. Musci Boreali-Americani Nos. 165 & 250, dis- 
tributed as Ph. calcarea, are without any doubt Ph. font ana. Up to the 
present no specimens of Ph. calcarea are known from America. 
var. HETEROPHYLLA Card & Ther. Univ. Cal. Publ {Bot.) 
2i 300. (1906), 
Leaves dimorphous, the lower normal, the upper short, imbricate 
scarcely revolute, laxly areolate with short cells. Perigonial leaves 
distinctly costate to apex, obtuse or acute in the same involucre. — 
{Card. & Ther., 1. c.) 
Range: — Alaska, Aleutian Islands, Selkirk Mts., Montana, Maine. 
9. PHILONOTIS I'OMENTELLA Mol. emend. Loeske, Hedw: 45 : 
203, (1906). 
Roth, Eur. Laubm. 2 : 239. t. 26 f. (1904). 
Ph. alpicola Jur. in sched. Lorentz, Moosst. 170. (1864). 
Ph. microcarpa Kindb., Rev. Bryol. 32 : 37. (1905). 
Tufts more or less dense, radiculose ; stems erect, 6-10 cm. high, 
simple or with verdcillate branches. Leaves of two alternating 
