. Mosses with hand-lens and microscope : a non-technical hand-book of the more common mosses of the northeastern United States. ls and a den-droid habit or auriculate leaves are occasionally met with. The typical formseems most abundant along the coast and in the South; in general thisspecies has the range of C. Americanum, but is much less frequent inland thanthat species. Aquatic forms of the other two species may be confused with distinguished at a glance by its color and habit of growth: surelydetermined by the larger, proportionately broader branch leaves without theconspicuo
. Mosses with hand-lens and microscope : a non-technical hand-book of the more common mosses of the northeastern United States. ls and a den-droid habit or auriculate leaves are occasionally met with. The typical formseems most abundant along the coast and in the South; in general thisspecies has the range of C. Americanum, but is much less frequent inland thanthat species. Aquatic forms of the other two species may be confused with distinguished at a glance by its color and habit of growth: surelydetermined by the larger, proportionately broader branch leaves without theconspicuous auricles of C. Amcricanum, yet more auriculate than C. dendroides,and specially by its very short leaf cells. SUBFAMILY 4. POROTRICHEAE Plants dendroid in habit. Leaf cells short and broatl. Capsules unsymmetricand inclined, with a perfect hypnaceous peristome. Brotherus in Die Natiirlic-hen PHan/,enfamilien puts this subfamily in the Neckeraceae, an arrangement withwhich I am compelled thoroughly to disagree. All the characters, of our speciesat least, are hypnaceous except, possibly, the areolation. We have one genus. PLATE LXX. Porotrichum Alleahaniense (From Sulliv. Icones.) i. Plant natural size. HYPNACEAE 303 POROTRICHUM Brid. {Thummum B. & S.) and only one species. P. Alleghaniense (C. M.) Grout. This is a rather infrequent moss, growingon damp rocks in cool shaded ravines. It is said to be rare, but I believe thata careful search will reveal it almost anywhere in the mountainous regions ofour range, although it is a rare thing to find it fruiting. It is distinguished byits dendroid habit, like a small Climacium with its branches blown in one direc-tion, and its short rhomboidal to hexagonal leaf cells. The figures in Sullivantsplate are excellent and will enable the student to recognize it without furtherdescription. The spores mature in late autumn. It is true of many other mosses,as well as of the Hypnaceae, that mosses whose spores mature in late autumnmay be foun
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