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Published In: Traité Général des Conifères ou description de toutes les espèces et variétés aujourd'hui connues, avec leur synonymie, l'indication des procédés de culture et de multiplication qu'il convient de leur appliquer. 189. 1855. (Traité Gén. Conif.) Name publication detail
 

Project Name Data (Last Modified On 7/9/2009)
Acceptance : Accepted
Project Data     (Last Modified On 7/9/2009)
Status: Introduced

 

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1. Tsuga canadensis (L.) Carrière (eastern hemlock) Map 79

Trees to 15(–30) m tall. Trunks with orangish brown to grayish brown bark, the surface breaking into scaly plates and/or furrowed. Twigs pale brown to gray or yellowish brown, hairy. Leaves alternate, appearing more or less 2-ranked, 8–20 mm long, linear, flattened, the tip rounded, the base tapered to a short, usually twisted or bent petiole. Microstrobili globose, yellow. Megastrobili conelike, woody or the scales somewhat papery, 1.2–2.0 cm long, ovoid to broadly elliptic in outline, straight, dehiscing the first season, but persistent through the winter, the cone eventually shed intact. Cone scales obovate to circular, rounded at the tip, light green, turning light brown or grayish brown at maturity, not shiny. Seeds winged, 0.8–1.0 cm long (including the wing), the wing much longer than the rest of the seed. 2n=24. Pollen shed March–April.

Introduced, widely planted, but thus far reproducing only at a single site in Oregon County (northeastern U.S. west to Wisconsin, Indiana, and Alabama; Canada). Mesic upland forests and bluffs near homesites.

Eastern hemlock is included in the flora based upon a single collection from Oregon County, where it has spread from an old homesite up a steep, north-facing slope and along adjacent bluffs. The species requires a rich, sheltered site to survive. Elsewhere in the state, individual trees may be encountered, but these invariably were planted and are not reproducing.

 


 

 
 
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