rosinweed


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Related to rosinweed: compass plant, Silphium laciniatum

rosinweed:

see compass plantcompass plant
or rosinweed,
large, coarse North American perennial herb (Silphium laciniatum) of the family Asteraceae (aster family), found chiefly in open grasslands. The deeply cut leaves tend to point north and south.
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prarie dock

prarie dock

Yellow daisy-type flowers on tall leafless stem that can reach 10 ft (3m), taller than a person with HUGE heart/spade shaped thick, coarse, sandpapery leaves around base of plant. Top of young leaves shiny. Stalk can be green or reddish pink. Has smelly gummy sap that smells like turpentine and can be used as chewing gum to freshen breath and prevent nausea. Related to cup plant. Young leaves and shoots used in salads, roots used medicinally for fever, asthma, spleen, heart, liver, gallbladder, bile, cholesterol, antiseptic, stopping bleeding (astringent), ulcers, heavy menstrual periods, bruising, rheumatism.
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With added water and nutrients, rosinweed mounted a sizeable axillary regrowth response, in the end experiencing little or no loss of biomass or reproductive output.
Second, axillary regrowth should be favored, since gall damage occurred during a short period early in the season, when rosinweed shoots grow most rapidly (Fay and Hartnett 1991).
Field rosinweed grew amid a matrix of grasses and other forbs, and resulting low canopy light levels probably inhibited axillary meristem activity (Hillman 1984).
browsing by deer) typically stimulate axillary growth in field rosinweed (P.
From Antistrophus' perspective, independence of rosinweed tolerance and gall-wasp performance suggest that gall-wasp populations are not limited by rosinweed resource availability.
The independence of rosinweed tolerance and gall-insect parasitism rates suggests there may be no benefit to rosinweed to attract Antistrophus natural enemies.
Plant tolerance of gall-insect attack and gall-insect performance

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