. The Canadian field-naturalist. Natural history. 1997 Reddoch and Reddoch: The Orchids in the Ottawa District 139 Platanthera macrophylla (Goldie) P. M. Brown Goldie's Round-leaved Orchid Platanthere orbiculaire de Goldie Synonym: Habenaria macrophylla Goldie Platanthera macrophylla can be an impressive sight with its bright and sturdy inflorescence floating above two large green leaves in the shade of the forest where little else grows. However, only one plant has been seen in the District. Platanthera macrophylla forms a species pair with P. orbiculata and both share the distinguishing feat
. The Canadian field-naturalist. Natural history. 1997 Reddoch and Reddoch: The Orchids in the Ottawa District 139 Platanthera macrophylla (Goldie) P. M. Brown Goldie's Round-leaved Orchid Platanthere orbiculaire de Goldie Synonym: Habenaria macrophylla Goldie Platanthera macrophylla can be an impressive sight with its bright and sturdy inflorescence floating above two large green leaves in the shade of the forest where little else grows. However, only one plant has been seen in the District. Platanthera macrophylla forms a species pair with P. orbiculata and both share the distinguishing features of two large roundish leaves flat on the ground, a stem with a few cauline bracts and an inflorescence of long-spurred, greyish green and white flowers. Platanthera macrophylla can be separated most reliably from P. orbiculata by the average length of its spurs, which is 28 mm or more, and also by the average length of its hemipollinaria, which is mm or more. The two species do not differ significantly in height or, in spite of the epithet macrophylla, in leaf size. For more details, see the P. orbiculata account and Reddoch and Reddoch (1993). Given the small number of plants found in or near the District, additional herbarium records from an area bounded by latitudes 45° and 47°, and longitudes 73° and 77°, were included for the heights, flower num- bers and blooming dates given below. Most of these specimens were from north or south of Montreal and included the type specimen from the Island of Montreal (K!). Description Height: 34 (35 - 51) 63 cm [18 plants]. Flowers: 9 (9 - 21) 33 [16 plants]; sepals greyish green often with white margin, lateral sepals white at base; petals and lip white, sometimes greyish green toward the tips; spur translucent, white, greyish green distally; in a lax, regular to irregular inflores- cence; fragrance not detected by day. Leaves: 2, basal, shiny, deep green, silvery below. Overwintering State: likely similar to P. orbicu- lata;
Size: 1627px × 1535px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectnaturalhistory, booky
