Nine new species of Australian Nicotiana (Solanaceae) Author Bruhl, Jeremy J. Author Andrew, Damien D. Author Palsson, Ruth Author Jobson, Richard W. Author Taseski, Guy M. Author Samuel, Rosabelle text Australian Systematic Botany 2023 2023-07-07 36 3 167 205 http://dx.doi.org/10.1071/sb23001 journal article 295738 10.1071/SB23001 e7223c67-ed37-4d87-8f2d-b949ff711207 1446-5701 11122967 Nicotiana latzii M.W.Chase, R.W.Jobson & Christenh. , sp. nov. ( Fig. 15 .) Type : Queensland : 5 km east of Ethabuka Station Homestead , 85 m , 23°51′151″S, 138°30′50″E, 14 Oct. 2005 , Latz 21442 (holo: NT A0110082 !) . Diagnosis Nicotiana latzii is closely related ( Fig. 1 a ) and in morphology similar to N. latifolia and N. sessilifolia , but it lacks the broadly winged petiole and auriculate leaf base and has a shorter floral tube than do these two species. It is also similar to N. simulans N.T.Burb. in floral features, but has a much shorter petiole or wing. Erect, herbaceous, annual herbs , forming a minimal rosette, but with numerous large leaves in the basal portion of the stems, the main stem with major branches in the lower half of the inflorescence but only a few small ones in the upper half. Leaves with narrowly winged petioles to nearly sessile, the wing 1.0– 1.5 cm wide, bullate, blades 8.2–12.8 × 1.5–4.8 cm (including petiole), broadly ovate to lanceolate, the apex blunt to acute in the basal leaves, becoming acuminate in those higher up; upper leaf base gently attenuate, many slightly auriculate basally, margins entire, undulate, often basally bullate, uppermost leaves sessile often with a narrowly auriculate base. Vestiture composed of dense, gland-topped short hairs and longer multicellular, non-glandular hairs on all surfaces, in some cases the longer multicellular hairs on leaf margins with 1–2 branches. Inflorescence bracts sessile, linear lanceolate, ~ 0.5–2.3 cm long, the apex acuminate. Calyx 1.4–1.6 × 0.2 cm , one lobe slightly longer and one shorter than the others, the tips acuminate, slightly flaring to clasping, slightly wider and longer in fruit, extending 0.5 cm beyond and surrounding the capsule; the calyx slightly enlarging at maturity. Flowers white, outwardly to upward facing, upper part of the floral tube 0.2 cm longer than the lower. Corolla tube 2.0– 2.5 cm long (from tip of the calyx), slightly longer on the upper side of the flower, 0.2 cm in diameter, with no throat cup, the limb 1.6–1.8 cm across, the lobes slightly cleft, cleft 0.1 cm deep, sinus 0.7 cm deep, lobes 0.6 cm long; four stamens near throat of the floral tube in two pairs, didynamous, the lower pair 0.1 cm longer than the upper pair, and the fifth ~ 0.7 cm deeper in the tube. Fruit a capsule splitting in four lobes, 0.9–1.1 cm long at maturity. Fig. 10. Nicotiana gibbosa based on living plants cultivated at the Royal Botanic Gardens, Kew, grown from seeds associated with the holotype Andrew 240 & Bruhl , Long Point area past Hillgrove, Oxley Wild Rivers NP, New South Wales, vouchered as Chase & Christenhusz 21007 (K). Painted by Deborah Lambkin. Fig. 11. Nicotiana gibbosa based on living plants cultivated at the Royal Botanic Gardens, Kew, grown from seeds associated with the holotype Andrew 240 & Bruhl (NSW), Long Point area past Hillgrove, Oxley Wild Rivers NP, New South Wales. Drawn by Deborah Lambkin from living plants vouchered as Chase & Christenhusz 21007 (K). ( a ) Flower, side view. ( b ) Floral limb, face-on. ( c ) Carpel, style and stigma. ( d ) Corolla split open to show stamen positions. ( e ) Capsule at maturity. ( f ) Capsule with calyx removed. ( g ) Stem leaf. ( h ) Pubescence on leaf margin. ( i ) Pubescence leaf surface, showing pustulate hairs. ( j ) Pubescence on upper stem. ( k ) Pubescence on lower stem. ( l ) Habit. Scale bars: 2.0 cm ( a–f ); 6.0 cm ( g ); 5.0 mm ( h–k ); plant in ( l ) is 148 cm tall. Fig. 12. Habitat of Nicotiana gibbosa at Long Point, New South Wales, eucalypt shrubby to layered open forest, low closed forest ecotone after heavy rain following a fire the previous year. Photograph by Jeremy Bruhl. Distribution Thus far known only from north-central western Queensland between Ethabuka and Glenormiston Stations. Habitat and ecology Occurring in open sites, sometimes on the edges of a wetland. Phenology Collected in flower in October. Etymology Named for Peter K . Latz , who has extensively studied the flora of the central portion of Australia for more than 40 years, contributing his voluminous collections to the Northern Territory Herbarium ( NT ) in Alice Springs and elsewhere. He collected the holotype and another specimen of this species on one of his trips to the Ethabuka Station in the far west of Queensland . Fig. 13. Nicotiana forsteri based on living plants cultivated at the Royal Botanic Gardens, Kew, grown from seeds associated with Forster 41986 (BRI AQ0837934), Woroon National Park, west-south-west of Windera, Queensland. Drawn by Deborah Lambkin, vouchered as Chase & Christenhusz 18030 (K). ( a ) Floral limb, face-on. ( b ) Flower, side view. ( c ) Corolla split open to show positions of stamens. ( d ) Carpel, style and stigma. ( e ) Mature capsule. ( f ) Mature capsule with calyx removed. ( g ) Stem leaf. ( h ) Pubescence on pedicel. ( i ) Pubescence on upper stem. ( j ) Pubescence on lower stem. ( k ) Pubescence on leaf margin. ( l ) Pubescence on leaf surface showing pustulate hairs. ( m ) Habit. Scale bars: 1.0 cm ( a–f , h–l ); 6.0 cm; plant in ( m ) is 123 cm tall. Fig. 14. Map of the distributions of Nicotiana megalosiphon (green circles), N. latifolia (red circles), N. sessilifolia (blue circles), N. gibbosa (rose-purple circles), N. praecipitis (orange circle) and N. bungonia (aqua circle). Created by Maarten Christenhusz from data downloaded from the Australasian Virtual Herbarium website. Chromosome number Unlike the other members of the N. simulans complex, which are all n = 20, N. latzii is n = 18 ( M . W . Chase and F . Nollet, unpubl. data). Notes Collections of this species could be confused with N. simulans , N. latifolia or N. sessilifolia . The type specimen was originally identified by Latz as N. megalosiphon subsp. sessilifolia , from which it clearly differs in leaf shape and smaller flower (2.0–2.5 v . 3.8–5.0 cm). In addition to the collections at the Ethabuka Station by Latz, this species has been collected by R . W . Jobson east of the Glenormiston Homestead ~ 100 km north-east of Ethabuka. The holotype is represented in the phylogenetic analysis ( Fig. 1 a ) by a secondary specimen grown from viable seeds removed from Latz 21442 and vouchered as Chase & Christenhusz 18074 ( BRI ). The other accession ( Fig. 1 a ) is Chase & Christenhusz 18124 ( NSW ; BRI ), a secondary voucher grown from seeds associated with Jobson 3235 ( NSW ). Specimens examined QUEENSLAND . 14 km east of Ethabuka Homestead , Gypsum Hill , 23.8492°S , 138.6128°E , 15 Oct. 2005 , Latz 21474 ( NT A0110202 !); anabranch of the Georgina River, Donohue Highway , 24 km east of Glenormiston Homestead , swampy roadside vegetation, 160 m , 22°53′43″S , 139°2′21″E , 30 Sep. 2016 , Jobson 3235 ( NSW ) .