Taxonomic Swap 100594 (Guardado el 08/11/2021)

Añadido por kitty12 en 25 de octubre de 2021 a las 02:51 AM | Resuelto por kevinfaccenda en 08 de noviembre de 2021
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Oh no!!!! @kevinfaccenda - Why was this done without a discussion!?

Anotado por ddennism hace más de un año (Advertencia)

This is very disruptive for me, and at odds with at least two recent regional floras. I hope it can be reverted.

Anotado por ddennism hace más de un año (Advertencia)

They've been synonymized by most major authorities including FNA and POWO, and for over 15 years at that.

Feel free to leave a comment on the flag. It was open for 2 weeks without comment, not super long.

Anotado por kevinfaccenda hace más de un año (Advertencia)

@kevinfaccenda - "And for over 15 years at that." Yeah, dude. The recognition that S. lowrieanum is distinct is the new view, in contrast to that now very old FNA treatment. What an extraordinary pity to lose a taxon from our toolbox just because people assembling a global database missed it on their first pass. Newer floras published in the past year (Weakley, 2020) and few years (e.g. Weakley, 2020; Rhoads & Block, 2007) recognize this taxon. POWO does not bother to give a reason for their synonymy,

Please, please, please, in the future, follow the curator guidelines and at-reference people with a stake in these changes before committing them! We regularly diverge from POWO, especially when they make (understandable, given the immense scope of their project) errors of apparent oversight like this.

I will start the conversation to revert this abrupt and surprising step backwards under a flag on the S. cordifolium page; flags on inactive taxa are often ignored.

Anotado por ddennism hace más de un año (Advertencia)

@ddennism Might I suggest that you bring these newer treatments to the attention of Kew?

Anotado por kitty12 hace más de un año (Advertencia)

The FNA treatment includes both species #28 and #36a, which leaves ambiguity. See texts below:
FNA | Family List | FNA Vol. 20 | Asteraceae | Symphyotrichum

Symphyotrichum cordifolium (Linnaeus) G. L. Nesom, Phytologia. 77: 278. 1995.
Heartleaf or common blue wood aster, aster cordifolié
The type of Aster cordifolius var. laevigatus is conspecific with that of Symphyotrichum cordifolium. This name is the basionym of S. lowrieanum; therefore the latter cannot be considered distinct from S. cordifolium and is not recognized here. Most specimens initially identified as S. lowrieanum in herbaria have been re-determined as S. cordifolium. Some of the specimens, however, appear to correspond to the hybrid between S. cordifolium and S. laeve var. laeve, called S. ×schistosum (Steele) G. L. Nesom (syn. Aster schistosus Steele)."

36a. Symphyotrichum laeve (Linnaeus) G. L. Nesom var. laeve
Leaves lanceolate to ovate, con¬spic¬uously auriculate-clasping, less than 5 times as long as wide. Phyllaries strongly unequal, apical green zones diamond-shaped. 2n = 48.
Flowering (Jul–)Aug–Oct. Open, dry habitats, mixed- and tallgrass prairies, open, dry oak and other deciduous forests, glades and alvars, roadsides; 0–1000+ m; Man., N.B., Ont., Que.; Ala., Ark., Conn., Del., D.C., Ga., Ill., Ind., Iowa, Kans., Ky., Maine, Md., Mass., Mich., Minn., Mo., Nebr., N.H., N.J., N.Y., N.C. , N.Dak., Ohio, Pa., R.I., S.Dak., Tenn., Vt., Va., W.Va., Wis.; introduced in Mexico, West Indies, Central America, South America, Europe.
Variety laeve is found in the tallgrass prairies area and midwestern deciduous forest, mainly west of the Appalachian Mountains, but reaching the Atlantic from New Jersey to New England. It was introduced in Quebec and New Brunswick; it is also widely introduced outside North America. It is sold in the horticultural trade. Aster laevis forma beckwithiae House is a white-rayed phenotype that is not recognized here.
Hybrids of this variety have been reported with Symphyotrichum ciliolatum, S. cordifolium, S. drummondii, S. lanceolatum, S. lateriflorum, S. oolentangiense, and S. urophyllum. The hybrid with S. praealtum was described as Aster novibelgii Linnaeus var. litoreus A. Gray [S. novibelgii var. litoreum (A. Gray) G. L. Nesom; J. Labrecque and L. Brouillet 1996]. Symphyotrichum ×versicolor (Willdenow) G. L. Nesom (Aster versicolor Willdenow) is the hybrid between S. laeve var. laeve and S. novibelgii var. novibelgii. It is of garden origin and has escaped locally in Europe but has not been reported in North America.
Symphyotrichum ×gravesii (E. S. Burgess) G. L. Nesom (Aster gravesii E. S. Burgess), originally reported from Connecticut, may be the hybrid between S. laeve var. laeve and S. dumosum, though annotations suggest that the second parent might be S. cordifolium. Symphyotrichum ×woldenii (Rydberg) G. L. Nesom (Aster woldenii Rydberg), initially reported from Iowa, is possibly the hybrid between S. laeve var. laeve and S. praealtum, or S. oolentangiense and S. praealtum. The question of exact parentage is unresolved.
Distinction between var. laeve and var. geyeri is based on phyllary morphology. The two varieties appear to intergrade in the northeastern prairies but are mostly well defined at the extremes of the range, though plants in the western United States sometimes appear similar to var. laeve. These varieties are much more similar to each other than either is to var. concinnum or var. purpuratum and should be grouped in subsp. laeve. Alternately, var. geyeri could be considered a synonym of var. laeve."

Anotado por chuckt2007 hace más de un año (Advertencia)

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