. The Canadian field-naturalist. Natural history. 110 The Canadian Field-Naturalist Vol. Ill Platanthera clavellata (Michaux) Luer var. clavellata Club-spur Orchid Platanthere claviforme Synonyms: Habenaria clavellata (Michaux) Sprengel, Habenaria tridentata (Muhlenberg) Hooker Platanthera clavellata is neither abundant nor conspicuous. It can be identified by the single cauhne leaf at or somewhat below the centre of the narrow, ridged stem, the rather irregular arrangement of the flowers and the three rounded teeth at the end of the otherwise undivided and unfringed lip. Description Height: 1
. The Canadian field-naturalist. Natural history. 110 The Canadian Field-Naturalist Vol. Ill Platanthera clavellata (Michaux) Luer var. clavellata Club-spur Orchid Platanthere claviforme Synonyms: Habenaria clavellata (Michaux) Sprengel, Habenaria tridentata (Muhlenberg) Hooker Platanthera clavellata is neither abundant nor conspicuous. It can be identified by the single cauhne leaf at or somewhat below the centre of the narrow, ridged stem, the rather irregular arrangement of the flowers and the three rounded teeth at the end of the otherwise undivided and unfringed lip. Description Height: 10 (18 - 27) 36 cm and 46 cm (see Notable Plant below) [311 plants]. Flowers: 1 (3 - 10) 26 [180 plants]; pale green, pale yellow or white, sometimes greyish green along centre line on outside of dorsal sepal and at end of spur; irregularly arranged as a result of incomplete rotation about the pedicellate ovary, appearing to lie on their sides, often facing in a common direction toward the stronger light; when there are more flow- ers, the inflorescence becomes more regular; fra- grance mild and sweet or none. Leaves: 1, occasionally 2 on robust plants, the upper one much reduced, with 2 small bracts above; 1 leaf on non-flowering plants. Overwintering State: a greyish green shoot, - 2 cm tall, mm diameter, the tip just below ground or moss substrate level in early fall, rising from a horizontal root about 2 cm away from the current year's stem; herbarium specimens show the new shoot present at anthesis. Capsules: brown, ellipsoid, typically x cm, ascending irregularly; yield approaching 100% for three-quarters of the plants, highly variable for the remainder, averaging 85% [44 plants], plants susceptible to predation by White-tailed Deer, espe- cially in Gatineau Park. Seeds: light brown, released in mid September to early October. Blooming Periods: 5 July (11 July - 6 August) 17 August [28 records].. 76° 30 Platanthera clavellata var. clavellata: â = herbar
Size: 1633px × 1530px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectnaturalhistory, booky
