Sempervivum dolomiticum Facchini

Canella, Marco, Ranjbaran, Yasaman, Behrens, Eugen, Bonomi, Costantino, Orsenigo, Simone & Dal Grande, Francesco, 2024, Typification of the name Sempervivum dolomiticum Facchini (Crassulaceae), Italian Botanist 17, pp. 103-107 : 103-107

Sempervivum dolomiticum Facchini , Z. Ferdinandeums Tirol 5 (3): 56 (– 57). 1855.

Type.

Italy. “ Sempervivum (1843 / 9 / 23) Sas della Porta. In tre pendici fino alla sommità, meno 5–10 passi. In alto, come gli altri semprevivi fra l’erba per difesa. ” “ NB. Petala lata [?] 5 ’’’ longa, 1 1 / 3 lata reperta, medio striosatura fiore purpurea. Corolla S. arachnoideum major, sed quidem forma etiam germina. Squamae ut S. funkii , montani, etc .. ”, 23 September 1843, F. Facchini (lectotype designated here: TR-BOT 002203, image available at https://www.muse.it/home/ricerca-e-collezioni/le-collezioni-scientifiche/catalogo-online-collezioni-muse/#/dettaglio/d01a09a4-d253-4b2d-ba6a-58e5c706c24a).

Ind. Loc.

“ Sas della Porta. In tre pendici fino alla sommità, meno 5–10 passi ”. Reg. Trentino – Alto Adige, Prov. Trento. TAA.

Isotype.

Italy. “ Sempervivum (1843 / 9 / 23) Alpe del Sas della Porta (Sec. = Kolf.) cum fol. Caulinis superioribus ” 23 September 1843, F. Facchini TR-BOT 002204, image available at https://www.muse.it/home/ricerca-e-collezioni/le-collezioni-scientifiche/catalogo-online-collezioni-muse/#/dettaglio/db45fec9-a402-4ed5-a5b5-22e839671107).

Note.

Code TR-BOT 002203 and TR-BOT 002204 refer to the herbarium vouchers selected as lectotype and isotype. However, the TR herbarium provides a code for each handwritten original note attached to the voucher. In particular, the Gelmi and Ambrosi-Facchini collections are study herbaria, and often the notes have been added on multiple occasions. As a consequence, a single voucher may be registered with more than one code. This is the case of isotype TR-BOT 002204, which has an additional note (marked TR-BOT 002205, visible at the provided link).

Nomenclatural notes.

In the original description of S. dolomiticum, Facchini noted that this species co-occurs with Sempervivum arachnoideum L. (1753: 465) (“ […] germina angustiora S. aracnoidei ”), specifically noting the absence of apical trichomes in the rosette. Additionally, among the diagnostic characteristics, Facchini identified: leaves with marginal hairs, purple petals, linear-lanceolate leaves, and lanceolate petals (see Fig. 1 ). We could trace seven specimens of S. dolomiticum in the TR collections. Amongst these, five were collected by Facchini himself while two were collected by Enrico Gelmi (Table 1 ). The sampling locations of two specimens collected by Facchini (TR-BOT 002203 and TR-BOT 002204) match with the protologue: “ […] in Alpe Seekofl ”, corresponding to the locality Croda del Becco, a mountainous part of the complex of Croda Rossa, bordering Veneto and Trentino Alto Adige. Between the two sheets, the lectotype has been chosen based on the conservation status of the sample and the quality of the notes: voucher TR-BOT 002203 was chosen as lectotype and voucher TR-BOT 002204 as isotype. Notes on these vouchers report the same date and location and the plant material is probably part of a single gathering. The quality of the specimens is low in all the herbarium vouchers considered in this study, probably due to difficulties in desiccating and preserving succulent plant tissues. Nevertheless, we can evaluate the selected types as fully compliant with the species description.

Figures

Figure 1. Photograph of the lectotype of the name Sempervivum dolomiticum Facchini, TR-BOT 002203 (A); photograph of the plant in its natural habitat at the type locality Croda del Becco (locus classicus) (B), drawing based on living topotypical material, summarizing the main diagnostic characters: rosette with no apical hairs, linear-lanceolate leaves with marginal hairs, lanceolate petals (C).