. The Canadian field-naturalist. 1989 Mann: Charophytes of Insular Newfoundland 37 2. Chara canescens Desv. & Lois, in Lois. This species has not been previously reported from insular Newfoundland. Only one site is known to the author (Figure 2), a shallow brackish lagoon near the mouth of the St. Georges River [Canadian Topographical Map 12B/8, 945705]. The lagoon is now separated from the St. Georges River estuary by two highway embank- ments and a railway embankment, but still receives some water exchange through culverts. It drains surrounding peatlands, and, at its closest, it
. The Canadian field-naturalist. 1989 Mann: Charophytes of Insular Newfoundland 37 2. Chara canescens Desv. & Lois, in Lois. This species has not been previously reported from insular Newfoundland. Only one site is known to the author (Figure 2), a shallow brackish lagoon near the mouth of the St. Georges River [Canadian Topographical Map 12B/8, 945705]. The lagoon is now separated from the St. Georges River estuary by two highway embank- ments and a railway embankment, but still receives some water exchange through culverts. It drains surrounding peatlands, and, at its closest, it is separated from the Gulf of St. Lawrence by only 100 meters of semi-stabilized sand dunes. Readings taken with a Myron Model 512T5 DS Meter show the lagoon water to have a range between 4600- 5050 ppm dissolved solids. C. canescens is reported as a species of brackish coastal distribution or inland saline waters (Olsen 1944; Corillion 1957; Langangen 1974). C. canescens is haplostichous and the axes have a bristly appearance due to clusters or elongated spine cells. The St. Georges population is dioecious with no male plants apparent. This species is reported to produce viable spores parthenogeni- cally (Allen 1950; Corillion 1957), the only charophyte known to have this ability. Mature oogonia of this population are usually colorless (white) or at most only a faint orange, the oospores becoming black at maturity. Wood (1965) describes two forms of this species based mainly on plant size and the number of oospore striae. The Newfoundland plants are small, to cm in length with 9-13 oospore striae, and are therefore of the typical f. canescens. 3. Chara vulgaris L. em. Two distinct species of this diplostichous, monoecious Chara, C. contraria and C. vulgaris, have been recognized by European and North American authorities (Robinson 1906; Corillion 1957). The principal distinction between the two is axis cortication, C contraria being tylacanthous and C. vulgaris aul
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