Calyculate, furnished with an outer accessory calyx (calyculus) or set of bracts looking like a calyx, as in true Pinks.
This common species is well marked both by its color and by the delicate attachment of the capillitium to the calyculus.
It differs from all other American forms, so far described, in the peculiar development of the calyculus.
Sporangium ovoid-oblong; the calyculus small, sulcate and ribbed, granulose.
The calyculus is variable in size; in some examples the thin connecting membrane between the ribs has disappeared.
Sporangium ovoid; the calyculus very small, finely ribbed and granulose.
Sporangium ovoid, more or less elongated; the calyculus small, plicate-sulcate.
Sporangium cylindric; the calyculus small, granulose, ribbed and sulcate.
The colors are obscure, but the striations on the calyculus are violet-tinted, and the reds perhaps predominate elsewhere.
Sporangium oblong-ovoid, stipitate; the calyculus small, thin, smooth.