Neolasioptera eupatorii (Felt, 1907) stem gall midge.Asphondylia eupatorii Felt, 1911 (spring and summer generations) stem gall midge.This species is host to the following insect induced galls: It is a larval host for a few varieties of moths, including the Clymene moth ( Haploa clymene), Leucospilapteryx venustella, and the hitched dart moth ( Melanchra adjuncta). Its nectar attracts many species of butterflies and moths, bees, wasps, and flies. The plant blooms in the fall, from July to October. The species is adaptive to different growing conditions it is found in woods and brush thickets and also in shady areas with open bare ground, and it can be weedy in shady landscapes and hedgerows. The species is also native in Canada in Quebec, Ontario, and the Northwest Territories. Distribution and habitat Ī altissima is native to the central and eastern United States, from Texas in the west to Maine in the east and north, and Florida in the south. roanensis ( Appalachian white snakeroot) they differ in the length of the flower phyllaries and shape of the apices. There are two different varieties: Ageratina altissima var. The plant can spread either by the wind dispersal of its seeds or by rhizomes. The flowers are a clean white color and after blooming, small seeds with fluffy white tails are released to blow in the wind. Īt the end of the upper branches, flat-topped panicles or compound corymbs of white flower heads appear, measuring 5–15 centimetres (2–6 in) across. Leaves have sharply serrated margins and are up to 15 centimetres (6 in) long. The upper part of the plant has multiple branches, which usually appear in opposite pairs. Stems are smooth with opposite leaves spaced well apart, with each pair of leaves positioned at a 90-degree angle from the pair above and below ( decussate). Plants are upright or sometimes ascending, growing to 1.5 metres (4.9 ft) tall, producing single or multi-stemmed clumps in mid to late summer and fall. An older binomial name for this species is Eupatorium rugosum, but the genus Eupatorium has undergone taxonomic revision by botanists, and some species once included in it have been moved to other genera. 1798Īgeratina altissima, also known as white snakeroot, richweed, or white sanicle, is a poisonous perennial herb in the family Asteraceae, native to eastern and central North America. Eupatorium deltoides E.L.Braun 1940, illegitimate homonym not Eupatorium deltoideum Jacq.

Ageratina luciae-brauniae (Fernald) R.M.King & H.Rob.

Snakeroot andrea robertson