C14 Asters.Sym-Xan
COMPOSITAE PART FOUR Symphyotrichum to Xanthium Revised 1 April 2015 SUNFLOWER FAMILY 4 COMPOSITAE Symphyotrichum Vernonia Tetraneuris Xanthium Verbesina Notes SYMPHYOTRICHUM Nees 1833 AMERICAN ASTER Symphyotrichum New Latin, from Greek symphysis, junction, & trichos, hair, referring to a perceived basal connation of bristles in the European cultivar used by Nees as the type, or from Greek symphyton, neuter of symphytos, grown together. A genus of approximately Copyrighted Draught 80 spp of the Americas & eastern Asia, with the greatest diversity in the southeastern USA (according to one source). Cook Co, Illinois has 24 spp, the highest spp concentration in the country. See also Aster, Eurybia, Doellingeria, Oclemena, & Ionactis. X = 8, 7, 5, 13, 18, & 21. Density gradient of native spp for Symphyotrichum within the US (data 2011). Darkest green (24 spp. Cook Co, IL) indicates the highest spp concentration. ©BONAP Symphyotrichum X amethystinum (Nuttall) Nesom AMETHYST ASTER, Habitat: Mesic prairie. Usually found close to the parents. distribution - range: Culture: Description: Comments: status: phenology: Blooms 9-10. “This is an attractive aster with many heads of blue or purple rays; rarer white and pink-rayed forms also occur. … Disk flowers are perfect and fertile; ray flowers are pistillate and fertile.” (ILPIN) VHFS: Formerly Aster X amethystinus Nutt. Hybrid between S novae-angliae & S ericoides. This is a possible hybrid of Aster novae-angliae and Aster ericoides, or of A. novae-angliae and A. praealtus” (Ilpin) Symphyotrichum X amethystinum Symphyotrichum anomalum (Engelmann) GL Nesom BLUE ASTER, aka LIMESTONE HEART-LEAF ASTER, MANY RAY ASTER, MANYRAY ASTER, MANY-RAYED ASTER, subgenus Symphyotrichum Section Cordifolii Copyrighted Draught Habitat: Dry woods.
[Show full text]