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Astragalus saurinus Barneby, Dinosaur milkvetchMay 2, 2009, Uintah Co., Utah
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Upside down weather patterns have confused some native plant species into thinking that perhaps spring is here. Astragalus utahensis (Torr.) Torr. & Gray. January 5, 2012, Salt Lake County foothills, Olympus Hills Park, approx. 4860 ft. elev. The plant with the reddish leaf to the right is naturalized Erodium cicutarium, probably non-native but has been in the area for probaby at least 200 years.
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Known also as Shem milkvetch, Astragalus ampullarioides (syn. A. eremeticus var ampullarioides), was listed as endangered on the same date as A. holmgreniorum, i.e. on 9/28/2001, although the two species are not sympatric and grow on different soils and have different associated species. The Shivwits milkvetch grows on Chinle formation derived soils. It is a restricted endemic that only occurs in Utah, primarily in the southwestern area of the state (with a disjunct occurrence in Zion National Park).This is one of the relatively few species of Astragalus that suffers from herbivory. Its true taxonomic status with another yellow-flowered Astragalus that occurs in the area has yet to be studied.As with A. holmgreniorum, it was federally listed as endangered with critical habitat but its 2001 listing did not include that designation so it was included in a lawsuit to compel that action. Designation of critical habitat was then finally made as a result of that lawsuit on 12/27/2006 and a recovery plan finalized several months prior.May 1, 2004, Washington County, Utah, elev. approx. 3,040 ft.
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Astragalus mollissimus var. thompsoniae. The hillsides were stained with the pink-purple color of this species for several miles which were particularly vibrant as the sun was setting (it was shortly after 8PM when this picture was taken). Some of the other forbs here include Astragalus geyeri and Townsendia incana. Absent mature fruits (pods), this can be a difficult genus to in which to make plant identifications. The flower color of this species seems to be fairly consistent but among the many other characters to consider, the scapose peduncles is what convinced me of this ID compared to several other possibilities, and in light of the lack of mature pods. The pilose hairs on the forming pods are consistent with this diagnosis.These were more robust plants that I have seen compared to plants of this taxon in other parts of the state, plus they were in bloom later than expected: normally this species is among the earliest to bloom. The combination of the higher elevation plus the fact that 2011 was a "late" (delayed spring due to colder and temporarily wetter weather) is perhaps why these were in full bloom on this date in late May. They usually aren't seen growing this dense together either.May 28, 2011, Duchesne County, Utah, approx, 5,540 ft. elev.
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California, United States
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Nevada, United States
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Nevada, United States
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Sabino Creek, Santa Catalina Mountains, Arizona. April 23, 2010
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Known also as Tufted milkvetch, Astragalus spatulatus is a Great Plains species that has somehow made it this far west. It might be confused with the local endemic A. detritalis which was in flower on this same date in the same county (but not at this same location) and to which this species is somewhat related. The leaves of the two species are however quite different, and among other things, A. spatulatus has a tendency to form mats (as above) which A. detritalis does not. Often when this species is in bloom it is difficult to see the leaves because it tends to bloom profusely; this however had been a dry year.May 6, 2006, northern Duchesne County, Utah, sandy soil, approx. 5900 ft. elev.
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Painted Milkvetch
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Gjende, Oppland, Norge
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near Factory Road, Rutherford County, Tennessee, US
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Falling Waters Rd, 2 k (by rd) S of Pope county line, Pope County, Arkansas, US
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Lavin eggvetch, Astragalus oophorus var. lavinii, Pine Nut Mountains, elevation 1575 m (5160 ft)
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March 12, 2010. Sabino Creek, Arizona.
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California, United States
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Nevada, United States
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Zaragoza: Araragn (Espaa)Depresin del Ebro.Familia: LeguminosaeSinnimos: Astragalus cruciatusDistribucin: N de frica y SW de Europa. Se halla disperso por toda Pennsula Ibrica y en las Islas Canarias. En Aragn se encuentra principalmente por el S y E de la Depresin del Ebro, apareciendo de forma muy escasa y dispersa por el Sector pirenaico y Sistema Ibrico.Biologa y fenologa Hbitat: Claros de matorral y pastos secos y pedregosos.Preferencia edfica: Indiferente Rango altitudinal: 70- 1000 ( 1250 ) mFenologa: Floracin Abril - JunioForma Biolgica: Terfito reptanteExtractado del Atlas de la Flora de Aragn (Herbario de Jaca)
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