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?);... Plant native to Cyrenaica ( Libya ) with unique medicinal qualities now extinct. It only grew in a... Plant native to Cyrenaica ( Libya ) with unique medicinal qualities, now extinct. It only grew in a... Original articles from our library related to the Perfoliatum. See Table of Contents for further... Original articles from our library related to the Perfoliatum. See Table of Contents for further... ...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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