. The Canadian field-naturalist. Natural history; Sciences naturelles. 2005 Catling: Black Pine and Mugo Pine in Ontario 227 82c 80c 78c 76' 74c 100 Kilometers. Pinus nigra (escaped) i herbarium collections L sight records 84e 82° 80c 78c 76° Figure 2. Central and eastern portions of southwestern Ontario showing locations where Black Pine (Pinus nigra) has escaped from cultivation. Escaped occurrences supported by herbarium specimens at DAO, Agriculture and Agri- food Canada, Ottawa, are indicated with a solid dot. Sight records of the author are indicated by solid triangles. Ontario: Hastings
. The Canadian field-naturalist. Natural history; Sciences naturelles. 2005 Catling: Black Pine and Mugo Pine in Ontario 227 82c 80c 78c 76' 74c 100 Kilometers. Pinus nigra (escaped) i herbarium collections L sight records 84e 82° 80c 78c 76° Figure 2. Central and eastern portions of southwestern Ontario showing locations where Black Pine (Pinus nigra) has escaped from cultivation. Escaped occurrences supported by herbarium specimens at DAO, Agriculture and Agri- food Canada, Ottawa, are indicated with a solid dot. Sight records of the author are indicated by solid triangles. Ontario: Hastings: Hwy 7 east of Marmora, °N, °W, escaped from plantings, 22 Oct. 2001, P. M. Cat- ling 2001-20 (DAO sub subsp. mugo); Hwy 7 east of Marmo- ra, °N, °W, from a 10 year old escaped plant with cones with apophysis hooked and recurved, accompa- nied by seedlings beneath a plant referable to subsp. unci- nate 22 Oct. 2001, P. M. Catling 2001-11 (DAO sub subsp. uncinata); 13 km east of Marmora along Hwy 7, °N, °W, this branch collected from a small sapling Yi m tall, evidently escaped from planted shrubs 5 m tall within 20 m. many young plants 1-10 years old, 22 Oct. 2001, P. M. Catling 2001-8-2 (DAO sub nothosubsp. rotundata); Hwy 7 east of Marmora, °N, °W, K year old plant, escaped from roadside plantings, 22 Oct. 2001, P. M. Catling 2001-11, (DAO sub nothosubsp. rotundata); United Counties of Leeds and Grenville: 2 km NE of Brockville, °N, °W, shrub approx. 10 years old, escaped from plant- ings, 27 April 2002, P. M. Catling (DAO sub subsp. mugo). In addition to these vouchered observations, 13 sight records of young trees spread from cultivation are plotted on the accompanying map (Figure 3). (5) Identification Not all pines are easily identified. The most useful texts for identification are Shaw's (1914) well-illustrated compendium and the classic handbook by Dallimore et al. (1966). Cope (1986) als
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