No. 11.] THE BRYOPHYTES OF CONNECTICUT. 
23. 
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Bracts apparently adnate to the base of the perianth.. 
Marsupella, p 
Bracts entirely free from the perianth.................. 
Perianth strongly dorsi-ventrally compressed, not plicate 
In, UPPer (Pattee sw swe: owe neadaminee Hasler en gee Scapania, p. 
Perianth terete or slightly compressed, more or less plicate 
IN MPP Parts de inciew stagiieie caananed dasa die gure Adare tae kes 
Keels of leaves sharp..........-5.0.00005 Diplophylleia, p. 
Keels of leaves blunt...................5. eeanadea ae: p 
Leaves and underleaves (when present) with entire or 
denticulate margins ...........ccc ccc eeee ccc eeeeetans 
Plants green, often tinged with brown or red, growing in 
rather dry localities; leaf cells with trigones and a 
smooth cuticle ........... cece eee aiend Ptilidium, p. 
Plants pale green or yellowish, growing on the ground in 
swamps; leaf cells thin-walled, with a minutely striolate. 
CULICle yess canes vaineh eee ee fee Bae Soe Trichocolea, p 
Underleayes present: ..cccesssei as saaesee seeds saanes ewes 
Underleaves none: «ss ses ees ned 2s eed ees gare ea geueeePee z 
Underleaves undivided ........ 0.0... cc ccc eee cece eee 
Underleaves Diftd: c...2c2cgs cece dasnae vat SOaPS abe een Maes 
Ventral lobe of leaf not inflated, attached to the stem by 
@ Harrow DaS@sienws «diene coin yse dae eosluee een Porella, p. 
Ventral lobe of leaf inflated and forming a small water- 
sac, attached to the stem by a broad base............ 
Leutolejeunea, p. 
Ventral lobe of leaf attached to the stem by a broad base, 
forming an inflated water-sac.............. Lejeunea, p. 
Ventral lobe of leaf usually forming an inflated water-sac, 
entirely free from the stem............ 0. cc eee e eee 
Archegonial branch with one or two subfloral innovations 
jJubula, p 
Archegonial branch without subfloral innovations........ 
' Frullania, p. 
Dorsal lobes of leaves smooth and entire; perianth dorsi- 
ventrally compressed, truncate at the mouth.......... 
Radula, p 
Dorsal lobes of leaves denticulate and minutely roughened 
on outer surface by projecting cells; perianth inflated, 
five-keeled, and contracted at the mouth into a tubular 
Deak? «. castcaastiibienase shies ete Cololejeunea, p. 
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68 
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67 
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28 
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