Silphium laciniatum: Difference between revisions
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{{SPlantbox | |||
| | |familia=Asteraceae | ||
| | |genus=Silphium | ||
| | |species=laciniatum | ||
| | |common_name=Compass plant | ||
| | |name_ref=Flora - A Gardener's Encyclopedia | ||
| | |habit=herbaceous | ||
| | |habit_ref=Flora - A Gardener's Encyclopedia | ||
| | |Min ht box=5 | ||
| | |Min ht metric=ft | ||
| | |Max ht box=10 | ||
| | |Max ht metric=ft | ||
| | |height_ref=Flora - A Gardener's Encyclopedia | ||
| | |Min wd box=3 | ||
| | |Min wd metric=ft | ||
| | |Max wd box=4 | ||
| | |Max wd metric=ft | ||
| | |width_ref=Flora - A Gardener's Encyclopedia | ||
| | |lifespan=perennial | ||
| | |exposure=sun, part-sun | ||
| | |sun_ref=Flora - A Gardener's Encyclopedia | ||
| | |features=flowers, drought tolerant | ||
| | |flower_season=early summer, mid summer, late summer | ||
| | |flower_ref=Flora - A Gardener's Encyclopedia | ||
| | |flowers=orange, yellow | ||
| | |Temp Metric=°F | ||
| | |min_zone=4 | ||
| | |usda_ref=Flora - A Gardener's Encyclopedia | ||
| | |max_zone=9 | ||
|image=Compass_plant.jpg | |||
|image_width=180 | |||
}} | }} | ||
'''''Silphium laciniatum''''' ('''Compass Flower''', '''Compass Plant''' or '''Rosinweed''') is a species of [[flowering plant]] in the genus ''[[rosinweed|Silphium]]''. It is native to east-central [[North America]]. | |||
It is a [[perennial plant|perennial]] [[herbaceous]] plant similar in appearance to a [[sunflower]], growing to 1-4 m tall, with bristly-hairy stems. The [[leaf|leaves]] are alternately arranged, and deeply pinnately lobed; the basal leaves up to 40 cm long, becoming smaller higher up the stem. The [[flower]]s are produced in [[inflorescence|flowerheads]] (capitula) 5-12 cm diameter, with a ring of ray florets surrounding the 2-3 cm diameter center of disc [[Flower|floret]]s. Flowering is in late summer, typically from July to September. | |||
Compass plants are so named because they tend to align their foliage '''East-West''' to present the minimum surface area to the hot noon sunshine. The taproot of the compass plant may grow to more than 9-14 ft. deep, making it hardy and resistant to drought. | |||
{{Inc| | {{Inc| | ||
Silphium laciniatum, Linn. Compass Plant. St. about 6 ft. high, leafy at the base, much less so above, very rough: lvs. 1 ft. long or more, once or twice pinnately parted, the lobes oblong or lanceolate: fl.-heads several, sessile or short-peduncled, 2-5 in. across; rays 20-30. July-Sept. Ohio, west and south.— It is said of this species that the st.-lvs. tend to point north and south. | |||
Silphium laciniatum, Linn. Compass Plant. St. about 6 ft. high, leafy at the base, much less so above, very rough: lvs. 1 ft. long or more, once or twice pinnately parted, the lobes oblong or lanceolate: fl.-heads several, sessile or short-peduncled, 2-5 in. across; rays 20-30. July-Sept. Ohio, west and south | |||
{{SCH}} | {{SCH}} | ||
}} | }} | ||
==Cultivation== | ==Cultivation== | ||
===Propagation=== | ===Propagation=== | ||
===Pests and diseases=== | ===Pests and diseases=== | ||
== | |||
==Varieties== | |||
==Gallery== | ==Gallery== | ||
<gallery> | <gallery perrow=5> | ||
Image:Upload.png| photo 1 | Image:Upload.png| photo 1 | ||
Image:Upload.png| photo 2 | Image:Upload.png| photo 2 | ||
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==References== | ==References== | ||
<references/> | |||
<!--- xxxxx *Flora: The Gardener's Bible, by Sean Hogan. Global Book Publishing, 2003. ISBN 0881925381 --> | <!--- xxxxx *Flora: The Gardener's Bible, by Sean Hogan. Global Book Publishing, 2003. ISBN 0881925381 --> | ||
<!--- xxxxx *American Horticultural Society: A-Z Encyclopedia of Garden Plants, by Christopher Brickell, Judith D. Zuk. 1996. ISBN 0789419432 --> | <!--- xxxxx *American Horticultural Society: A-Z Encyclopedia of Garden Plants, by Christopher Brickell, Judith D. Zuk. 1996. ISBN 0789419432 --> | ||
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__NOTOC__ | |||
Latest revision as of 15:20, 30 May 2010
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Silphium laciniatum (Compass Flower, Compass Plant or Rosinweed) is a species of flowering plant in the genus Silphium. It is native to east-central North America.
It is a perennial herbaceous plant similar in appearance to a sunflower, growing to 1-4 m tall, with bristly-hairy stems. The leaves are alternately arranged, and deeply pinnately lobed; the basal leaves up to 40 cm long, becoming smaller higher up the stem. The flowers are produced in flowerheads (capitula) 5-12 cm diameter, with a ring of ray florets surrounding the 2-3 cm diameter center of disc florets. Flowering is in late summer, typically from July to September.
Compass plants are so named because they tend to align their foliage East-West to present the minimum surface area to the hot noon sunshine. The taproot of the compass plant may grow to more than 9-14 ft. deep, making it hardy and resistant to drought.
Standard Cyclopedia of Horticulture |
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Silphium laciniatum, Linn. Compass Plant. St. about 6 ft. high, leafy at the base, much less so above, very rough: lvs. 1 ft. long or more, once or twice pinnately parted, the lobes oblong or lanceolate: fl.-heads several, sessile or short-peduncled, 2-5 in. across; rays 20-30. July-Sept. Ohio, west and south.— It is said of this species that the st.-lvs. tend to point north and south. CH
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Cultivation
Propagation
Pests and diseases
Varieties
Gallery
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photo 1
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photo 2
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photo 3
References
External links
- w:Silphium laciniatum. Some of the material on this page may be from Wikipedia, under the Creative Commons license.
- Silphium laciniatum QR Code (Size 50, 100, 200, 500)