1. Corollas greenish-white to white, 2-4.5 mm long, usually less than twice as long as the calyces; leaves ascending................. A. cannabinum
1. Corollas pinkish, 3.5-10 mm long, usually more than twice as long as the calyces; leaves spreading to drooping.
2. Calyces usually at least half as long as the corollas, lobes abruptly sharp-pointed to long-pointed ............................x A. floribundum
2. Calyces usually less than half as long as the corollas, lobes obtuse .....................A. androsaemifolium
Habitat / Range
Dry roadsides, fields, meadows and open forests in the lowland to subalpine zones; common throughout BC except the Queen Charlotte Islands and adjacent coast; N to AK, YT and NT, E to NF and S to GA, TX, NM and CA.
Ecological Framework for Apocynum androsaemifolium
The table below shows the species-specific information calculated from original data (BEC database) provided by the BC Ministry of Forests and Range. (Updated August, 2013)
A shade-intolerant, submontane to montane, transcontinental North American forb distributed more in the Cordilleran than the Pacific region. Occurs on very dry to moderately dry, nitrogen-medium soils within boreal, temperate, and cool mesothermal climates. Its occurrence increases with increasing continentality and temperature, and decreases with increasing elevation and precipitation. Usually inhabits unshaded and strongly drained, watershedding sites with exposed mineral soil or thin Mor humus forms. Characteristic of moisture-deficient sites.
