Family - Asteraceae Stems - Stout erect herbaceous to +2.5m tall branching in the apical 1/2... Family - Asteraceae Stems - Stout, erect, herbaceous, to +2.5m tall, branching in the apical 1/2,... head--the rays of Silphium are very long. In this genus only the ray flowers produce fruit; the... head--the rays of Silphium are very long. In this genus, only the ray flowers produce fruit; the... phyllaries (bracts) underneath the inflorescence phyllaries (bracts) underneath the inflorescence the stems in Silphium are extremely hairy having a sandpaper feel the stems in Silphium are extremely hairy, having a sandpaper feel Disk flowers - No info. yet. Disk flowers - No info. yet. Family - Asteraceae Stems : Family - Asteraceae Stems : Family - Asteraceae Stems - No info. yet. Family - Asteraceae Stems - No info. yet. Family - Asteraceae Stems - To +1m tall simple to branching near apex erect herbaceous hirsute... Family - Asteraceae Stems - To +1m tall, simple to branching near apex, erect, herbaceous, hirsute... There are 5 varieties of Silphium asteriscus listed in Weakley's Flora - not sure which one this one... There are 5 varieties of Silphium asteriscus listed in Weakley's Flora - not sure which one this one... the lower leaves of S. radula are opposite (also do you notice how the stem appears square?);... the lower leaves of S. radula are opposite (also, do you notice how the stem appears square?);... Family - Asteraceae Stems - No info. yet. Leaves - No info. yet. Family - Asteraceae Stems - No info. yet. Leaves - No info. yet. ...the upper stem leaves show a tendency to be alternate ...the upper stem leaves show a tendency to be alternate Disk flowers : Disk flowers : Inflorescence - No info. yet. Involucre - No info. yet. Inflorescence - No info. yet. Involucre - No info. yet. Durham Co. NC 6/21/2009 Durham Co., NC 6/21/2009 Family - Asteraceae Stems - No info. yet. Family - Asteraceae Stems - No info. yet. Ray flowers : Ray flowers : Disk flowers - No info. yet. Disk flowers - No info. yet. Flowering - August - October. Habitat - Dry open and rocky woods glades prairies dry slopes... Flowering - August - October. Habitat - Dry open and rocky woods, glades, prairies, dry slopes,... Arrow showing the undivided style of the disk flower. Flowering - May - September. Habitat - Rocky... Arrow showing the undivided style of the disk flower. Flowering - May - September. Habitat - Rocky... Durham Co. NC 6/21/2009 Carolina Nature Birds Fungi Herps Insects Beetles Butterflies ... Durham Co., NC 6/21/2009 Carolina Nature Birds Fungi Herps Insects Beetles Butterflies ... Flowering - July - September. Habitat - Flatwoods sandhills. Origin - Native to North America.... Flowering - July - September. Habitat - Flatwoods, sandhills. Origin - Native to North America.... Involucre. Ray flowers - No info. yet. Involucre. Ray flowers - No info. yet. A pseudanthium in Bloomington 8/2/03. A pseudanthium in Bloomington, 8/2/03. Disk flowers - Disk +2cm broad. Flowers staminate. Corolla tube yellow 8-9mm long contracted in... Disk flowers - Disk +2cm broad. Flowers staminate. Corolla tube yellow, 8-9mm long, contracted in... Silphium perfoliatum: cup plant 3648 × 2736 home garden plants wildlife seed plant sale topics... Silphium perfoliatum: cup plant 3648 × 2736 home garden plants wildlife seed plant sale topics... Durham Co. NC 6/21/2009 Durham Co., NC 6/21/2009 Involucre. Ray flowers - Fertile typically 9 or 10. Ligules yellow to 2.5cm long 1cm broad... Involucre. Ray flowers - Fertile, typically 9 or 10. Ligules yellow, to 2.5cm long, 1cm broad,... Arrow showing the undivided style of the disk flower. Flowering - May - September. Habitat - Rocky... Arrow showing the undivided style of the disk flower. Flowering - May - September. Habitat - Rocky...
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