Eastern Mojave Vegetation Coll. No. 2433, Solidago nemoralis ssp. decemflora  


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  Asteraceae Solidago nemoralis decemflora
Photographed 30 December 2020.

Plants of Jefferson County Open Space
Jefferson County, Colorado

Solidago nemoralis Aiton var. decemflora (DC.) Brammall ex Semple.  Gray Goldenrod.

Apex Park - Northern Parcel, Jefferson County, Colorado. Northeast quadrant of Apex Park - North Parcel, base of the Rocky Mountains foothills scarp, 4.56 km. south of the GNIS location of Golden. 39.7239N, 105.2198W. WGS 1984 Elev. 1886 m. Leaves strongly 3-nerved, inflorescences with many mating assassin bugs. Large patch perhaps 40 m. × 10 m. Mixed foothills grass- and shrub-land, the grasses having long since senesced in this long, hot, dry summer. Compare to Coll. No. 2432, made 140 m. to the northeast.

Collected by permit: Jefferson County Open Space, 2020, issued: Apr 13, 2020, to: Tom Schweich.

Tom Schweich 2433. 19-Aug-2020

Coll. No. 2432 & 2433, 19 Aug 2020, characters observed: Perennial, 30-47 cm., stem and leaves short hairy throughout, getting a little glandular in the inflorescence; Leaves, basal, absent, withered(?), cauline, alternate, oblanceolate, 75 mm. × 12 mm. wide in #2432 vs. 75 mm. × 27 mm. wide in #2433, reduced above, distally shallowly toothed, veins, #3, lateral veins less prominent but clearly present; Inflorescence, panicle, compact, branches secund; Involucre, 4-5 mm., Phyllaries, imbricate in 3+ series, inner, > outer, oblong, 3.6 mm. × 1 mm. wide, veins, #1, tips, rounded; Flowers, of 2 kinds; Rays, #7(8), tube 2.6 mm. + blade 1.8 mm., yellow, fertile; Disk flowers, #5, tube 2.0-2.5 mm. + lobes 1.0-1.3 mm., yellow; Pappus, bristles, 4 mm.

I'm not sure what this is. It keys to Solidago nemoralis var. decemflora in Ackerfield (2015), but does not look much like photos or voucher images on SEINet. It keys to S. nana in Weber & Wittmann (2012), but also does not look much like photos or voucher images on SEINet. It does seem to fit into Solidago subsect. nemorales per Semple (2018). I suppose it could be a hybrid of some sort. I am open to other suggestions.

Tom Schweich

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Other photos about Species - Asteraceae or Solidago nemoralis decemflora.


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Date and time this page was prepared: 6/16/2024 11:57:38 AM