Helianthus giganteus L. [E]

En: giant sunflower, tall sunflower
Fr: hélianthe géant, soleil géant
Provincial Status: E [ephemeral; not persistent]
Range: Temp. c/eNA; NS-NB, sON; intr. in eNfld., but not persistent.

[=Helianthus alienus E.Watson]
[=Helianthus angustifolius L. subsp. giganteus (L.) Anashch.]
[=Helianthus borealis E.Watson]
[=Helianthus carolinanus Hill]
[=Helianthus giganteus L. subsp. alienus (E.Watson) R.W.Long]
[=Helianthus giganteus L. var. subtuberosus Britton]
[=Helianthus nuttallii Torr. & A.Gray var. subtuberosus (Britton) B.Boivin]
[=Helianthus subtuberosus Bourg. ex A.Gray]
[=Helianthus validus E.Watson]

[A collection of Helianthus giganteus (as H. nuttallii var. subtuberosus) was reported in Rouleau (1978) from Topsail Rd., St. John's (GH) (Scoggan 1978).  More recently, Titford & Titford (1995) reported Helianthus nuttallii (likely var. subtuberosus) from NE of St. John's; this population has not persisted.]   

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