Neja pinifolia (Poir.) Nesom (1994a: 171)

Moraes, Pedro Luís Rodrigues De, 2020, Nomenclatural notes on the taxonomic identity of Sprengel’s Erigeron dubius, E. montevidensis, E. resinosus and E. filiformis (Asteraceae), Phytotaxa 438 (2), pp. 95-106 : 102-103

Neja pinifolia (Poir.) Nesom (1994a: 171) .

Basionym:— Erigeron pinifolius Poiret (1808: 490) , as “ pinifolium ” ≡ Hysterionica pinifolia (Poir.) Baker (1882: 12) . Protolog:—“Cette plante a été recueillie, par Commerson, à Buenos-Ayres. (V. s. in herb. Desfont.)”. Type:— ARGENTINA. Buenos Aires, s.d., P. Commerson s.n. (holotype: FI-W barcode FI006113, ex Herb. Desfontaines; isotype: P barcode P02484196, ex Herb. Poiret).

Synonym:— Diplopappus pinifolius Hooker & Arnott (1836: 48) . Type:— BRAZIL. “Rio Grande”, s.d., J. Tweedie s.n. (holotype: K barcode K000250518, ex Herb. Hookerianum).

In the protolog of E. pinifolius, Poiret (1808) informed that he had seen Commerson’s material from the Herbarium Desfontaines. The general herbarium of Desfontaines was acquired by Philip Barker Webb and is now at FI-W ( Stafleu & Cowan 1976). In Herbarium Webbianum ex Herb. Desfontaines, the herbarium sheet FI006113 has two specimens mounted on it, which belong to the same taxon and closely match the protolog of Erigeron pinifolius . It bears an original label annotated by Poiret with “ Erigeron pinifolium . Poir. [...] aff. Er. graminei. Lin. / Buenos Aires ”, and a label annotated by Desfontaines with “Buenos-Aires Commerson”, therefore allowing it to be taken as the holotype. In Paris, specimen P02484196, ex Herb. Poiret ex Herb. Moquin-Tandon in Herbarium E. Cosson, can be taken as an isotype, since it was annotated by Poiret with “ Erigeron pinifolium n. / Buenos-Aires. Commers.”.

Specimen K000250518, the holotype of Diplopappus pinifolius Hook. & Arn. , is annotated with “Rio Grande. Tweedie.”, and bears a label handwritten by Arnott with “ Diplopappus pinifolius H&A / an Erigeron pinifolius Poir. (I am not certain if the outer pappus is paleaceous, although I suspect so, as your specim. is in a frail state, and I have none whatever)”.