Nototrichium Hillebr., 1888

Iamonico, Duilio, 2018, Generic typifications in Amarathaceae s. str., Phytotaxa 350 (2), pp. 147-154 : 149-150

Nototrichium Hillebr.

Nototrichium is an endemic genus from the Hawaiian Islands ( Havran & Ross 2013), currently including three species, two of which (syntypes for Nototrichium ) were originally referred to by Hillebrand (1888: 372): “ Nototrichium sandwicense ” [a newly proposed, but not validly published combination (see discussion below) of “ Ptilotus sandwicense ” (a nomen nudum, see discussion below), with two varieties, “var. kauaiense Gray ex Hillebrand (1888: 373) ”, and “var. longespicatum Hillebrand (1888: 373) ”], and N. humile Hillebrand (1888: 373) . The third currently accepted species is N. divaricatum Lorence (1996: 64) (see Havran & Ross 2013, Wagner et al. 2016). Hillebrand (1888: 372) also described N. viride Hillebrand (1888: 373) (a third syntype for Nototrichium ) which is currently considered as conspecific with “ N. sandwicense ” (see e.g., Native Plants Hawaii 2009).

The designation “ Nototrichium sandwicense ” by Hillebrand (1888: 372) was originally published by Mann (1867: 200) as “ Ptilotus sanwicensis Gray ”. Mann (1867: note “*”) reported a diagnosis and the sentence “in Bot. S. Pacif. Expl. Exp. ined. (M. & B. [= Mann & Brigham, as reported by Mann (1867: 148)] 590; Remy 207.)”. The latter citation refers to the expedition “ United States South Pacific Exploring Expedition” as indicated by Mann (1867) in the first page of the Introduction of his Enumeration of Hawaiian plants. Mann (l.c.) also specified that he examined “collections of Hawaiian plant in the Gray Herbarium”, a set of which was “gathered by Jules Remy”. Unfortunately, no diagnosis or description or reference to a previous published diagnosis or description was given, so the name “ Ptilotus sandwicensis ” is a nomen nudum (Art. 38.1), and consequently, the Hillebrand’s combination was not validly published. Fortunately, a name ― N. viride ― is available for the Hawaian taxon known as “ Nototrichium sandwicense ” (see Native Plant Hawaii 2009).

From among Nototrichium viride and N. humile (sintypes), the first one occurs in all the eight Hawaiian Islands, while N. humile is restricted to East Maui, and O’ahu Island (Wai’anae Mountains) (see Wagner et al. 2016). I prefer to designate here the most frequent species ― N. viride ― as the generitype of Nototrichium . Sherff (1951: 6) proposed a “lectotypification” of “ Nototrichium sandwicense ” on a specimen preserved at GH00037133. However, since it has no nomenclature status, it cannot be typified.

Concerning Nototrichium viride , I found four specimens at BISH (barcode BISH1005567), GH (barcode GH00037128), K (barcode K000814959), and US (barcode US 00102713) each bearing a plant collected by H. Mann and W.T. Brigham (collection number: 590) in the Hawaian Island, Kauai County, Hanapepe locality. These label data match the protologue and the four specimens can be considered as part of the original material. I designate here the GH00037128 as the lectotype of the name Nototrichum viride , the other specimens are isolectotypes.

Nototrichium 1 Hillebrand (1888: 372).

Type (here designated):— Nototrichium viride Hillebrand (1888: 373) .

Species richness and distribution: —An endemic genus native to Hawaiian Islands including three species (see Native Plant Hawaii 2009, Havran & Ross 2013, Wagner et al. 2016).

Nototrichium viride Hillebrand (1888: 373) .

Type (lectotype, designated here):— HAWAII. Hanapepe, Kauai, s.d., Mann & Brigam 590 (GH00037128 [Digital image!], image of the lectotype available at https://s3.amazonaws.com/huhwebimages/1B734ECAF549486/ type/full/37128.jpg; isolectotypes are available at BISH1005567 [Digital image!], image of the isolectotype available at http://plants.jstor.org/stable/10.5555/al.ap.specimen.bish1005567?searchUri=filter%3Dname%26so%3Dps_ group_by_genus_species%2Basc%26Query%3Dnototrichium%2Bviride; K000814959, [Digital image!], image of the isolectotype available at http://apps.kew.org/herbcat/getImage.do?imageBarcode=K000814959; and US 00102713 [Digital image!], image of the isolectotype available at http://plants.jstor.org/stable/10.5555/al.ap.specimen.us00102 713?searchUri=filter%3Dname%26so%3Dps_group_by_genus_species%2Basc%26Query%3Dnototrichium%2Bvir ide) .

‒ “ Nototrichium sandwicense ” Gray ex Mann (1867: 200) , nom. nud. (not validly publishedArt. 38.1)

‒ “ Ptilotus sandwicensis ” Hillebrand (1888: 373) (combination not validly published)

‒ “ Psilotrichium sandwicense ” Seeman (1865 ‒ 1873: 198, in note) (combination not validly published)