Erechtites hieraciifolius (L.) Raf. ex DC.
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Filed As
Asteraceae
Erechtites hieraciifolius (L.) Raf. ex DC. -
Collector(s)
M. H. Nee 59446, 15 Sep 2012
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Location
United States of America. New York. Bronx Co. New York City. The New York Botanical Garden, at edge of Lower Twin Lake.
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Habitat
Area cleared last year of brush and some trees, grown up to mostly native weedy species such as Phytolacca americana, Impatiens capensis, Solanum ptycanthum, Cyperus, Polygonum punctatum, Eupatorium rugosum, also with Persicaria extremiorientalis.
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Description
Common, erect, single-stemmed annual herbs, a few shaded and only 0.4m tall, unbranched and with only a few heads. This plant one of the largest ones, 2.2m tall and branched above stems to 2.5cm in diameter. Leaves all sessile, variable in shape and size, the ones on the lower stem shallowly dentate, the middle ones where branching beginning are the largest and most deeply lobed, the upper ones again smaller and only dentate. A large plant like this has heads in various stages, always inconspicuous and appearing yellow-green from a distance except when with mature white pappus; phyllaries yellow-green. Florets inconspicuous, appearing yellow-green except when examined closely; outer (pistillate) florets usually pale yellow-green, but sometimes the upper corolla tube pale pink; inner (perfect) florets with the anthers pink or reddish at some stages, and the corolla lobes definitely pink; flowers visited by Apis mellifera and a large and a small bumblebee, but only probing the florets at certain stages, alighting on the head and probing the florets, "walking" around the head once or twiceduring the process before moving on to another head. After finishing with one plant, they usually examine a few more heads on that plant, then fly to another and repeat the process. The bees must be using visual clues as all heads seem to be odorless. Mature heads always looking disheveled, even after a week with no rain, the old central florets clotted and matted and keeping the pappus together (unlike symmetrical heads of free fruits of, e.g., Lactuca or Tagopogon), seemingly an inefficient way of dispersal. Phenology of specimen: Fruit.
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Identifiers
NY Barcode: 2075161
Occurrence ID: 95e04068-d207-4e18-92ff-f36df5394d9e
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Feedback
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Kingdom
Plantae
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Division
Magnoliophyta
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Order
Asterales
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Family
Asteraceae
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All Determinations
Erechtites hieraciifolius (L.) Raf. ex DC. det M. H. Nee, 2013
Note: ! D. Atha (NY), 2015
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Region
North America
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Country
United States of America
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State/Province
New York
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County/Municipio
Bronx Co.
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City/Township
New York City
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Locality
The New York Botanical Garden, at edge of Lower Twin Lake
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Elevation
Alt. 18 m. (59 ft.)
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Coordinates
40.8672, -73.8765
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Distribution
The New York Botanical Garden copyright reserved 02075161 The New York Botanical Garden Plants of U.S.A. Asteraceae Erechtites hieraciifolius (L.) DC. det. M. Nee, 2012 New York State, Bronx Co., Bronx, The New York Botanical Garden, at edge of lower Twin Lake. 40°52’02”N, 73°52’35.5”W alt. 18 m. Area cleared last year of brush and some trees, grown up to mostly native weedy species such as Phytolacca americana, Impatiens capensis, Solanum ptycanthum, Cyperus, Polygonum punctatum, Eupatorium rugosum, also with Persicaria extremiorientalis. Common, erect, single-stemmed annual herbs, a few shaded and only 0.4 m tall, unbranched and with only a few heads. This plant one of the largest ones, 2.2 m tall and branched above stems to 2.5 cm in diameter. Leaves all sessile, variable in shape and size, the ones on the lower stem shallowly dentate, the middle ones where branching beginning are the largest and most deeply lobed, the upper ones again smaller and only dentate. A large plant like this has heads in various stages, always inconspicuous and appearing yellow-green from a distance except when with mature white pappus; phyllaries yellow-green. Florets inconspicuous, appearing yellow-green except when examined closely; outer (pistillate) florets usually pale yellow-green, but sometimes the upper corolla tube pale pink; inner (perfect) florets with the anthers pink or reddish at some stages, and the corolla lobes definitely pink; flowers visited by Apis mellifera and a large and a small bumbelbee, but only probing the florets at certain stages, alighting on the head and probing the florets, “walking” around the head once or twice during the process before moving on to another head. After finishing with one plant, they usually examine a few more heads on that plant, then fly to another and repeat the process. The bees must be using visual clues as all heads seem to be odorless. Mature heads always looking disheveled, even after a week with no rain, the old central florets clotted and matted and keeping the pappus together (unlike symmetrical heads of free fruits of, e.g., Lactuca or Tragopogori), seemingly an inefficient way of dispersal. Coll.: M. Nee 59446 [5 Sept. 2012 02075161
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Erechtites hieraciifolius (L.) Raf. ex DC.