. The Canadian field-naturalist. Listera X veltmanii (L. convallahoides X auriculata) Hybrid (Figure 5), Known from Madawaska County. This putative hybrid could be anticipated wherever the two parents might occur adjacent to each other. Luer (1975) knew it only from the type locality in Alger County, Michi- gan. Catling (1976) reported it from 10 widely separ- ated sites in Newfoundland, New Brunswick, Quebec, Ontario, and Michigan and we have seen a specimen from Coos County, New Hampshire (UNB). Catling (1976) mapped a specimen {A. A. Eaton, July 11, 1904, Mountain back of Claire, New Brunsw
. The Canadian field-naturalist. Listera X veltmanii (L. convallahoides X auriculata) Hybrid (Figure 5), Known from Madawaska County. This putative hybrid could be anticipated wherever the two parents might occur adjacent to each other. Luer (1975) knew it only from the type locality in Alger County, Michi- gan. Catling (1976) reported it from 10 widely separ- ated sites in Newfoundland, New Brunswick, Quebec, Ontario, and Michigan and we have seen a specimen from Coos County, New Hampshire (UNB). Catling (1976) mapped a specimen {A. A. Eaton, July 11, 1904, Mountain back of Claire, New Brunswick (AMES)) in Kent County, which however, in our opinion, was collected in Madawaska County. Another specimen {Cunningham & Loucks, July 22, I960, 2'/2 mi W of Summit Depot, Madawaska County (DAO)), was, in Catling's opinion, atypical, and perhaps represented a backcross with L. Figure 3 A, Listera convallarioides. 3B, Distribution oiLis- tera convallarioides in New Brunswick. The hybrid L. X veltmanii is shown as X. Identification Key This key will help with the identification of the species of Listera found in New Brunswick. Column of the flower no more than mm long; lip deeply cleft into pointed linear-lanceolate lobes Lip with a tooth on each side at the base; rachis and pedicels glabrous L. cordata (Figure 4) Lip auricled at the base; rachis and pedicels glandular L. australis (Figure 2) Column of the flower more than mm long; lip pear-shaped or oblong, shallowly notched or cleft no more than one- third its length Lip with a short claw, without basal auricles extending beyond the column Base of lip with an indistinct auricle on each side; lip shallowly notched L. convallarioides (Figure 3) Base of lip with a distinct auricle on each side; lip deeply cleft L. X veltmanii (Figure 5) Lip sessile with basal auricles extending beyond the column L. auriculata (Figure 1) The distribution maps are based on specimens from the following herbaria: CAN,
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