Hieracium joannei Szeląg, 2017

Szeląg, Zbigniew, 2017, A new species and a new range extension in Hieracium sect. Cernua (Asteraceae) from Romania, Phytotaxa 309 (2), pp. 173-178 : 173-177

Hieracium joannei Szeląg , sp. nov. ( Figs. 1–3 )

Type: — ROMANIA. Southern Carpathians , Şureanu Mountains , SE slope of Muntele Pravăţ ridge, Obârşia Lotrului tourist area, 250 m south of a road junction No. DN 7 A and No. DN 67 C, grassy slope and siliceous rocks on Picea abies forest margin along a road, 1370 m a.s.l., 17 July 2014, Z. Szeląg (holotype KRAM; isotypes CL, KRA, Herb. Hierac. Z. Szeląg) .

Paratypes: —Specimens from the living plants collected in the type locality on 17 July 2014 and cultivated in the author’s garden, herbarized on 20 June 2016, Z. Szeląg (Herb. Hierac. Z. Szeląg).

Description: —Phyllopodous. Stem 40–60 cm high, pale green, purplish at the base, within synflorescence with sparse stellate hairs and pale, dark-based, simple hairs 1–3 mm long mixed with dark glandular hairs 0.1–0.2 mm long, in the middle with few, pale, 2–3 mm long simple hairs, at the base with sparse, pale simple hairs up to 2 mm long. Basal leaves 6–12, green, lanceolate to oblanceolate; the outer leaves remotely denticulate to ±entire; the inner leaves dentate; 9–15 cm long and 2–4 cm wide, acute at apex, gradually tapered to a long, purplish at the base, winged petiole, covered by numerous, pale simple hairs 2 mm long; on the upper surface glabrous or nearly so; on the lower surface with sparse, pale simple hairs 0.5–1.5 mm long, along the midrib with scattered to numerous pale simple hairs 3–5 mm long, on the margins with scattered pale simple hairs up to 1 mm long, mixed with microglands. Cauline leaves 1–3, rapidly reduced upwards, sessile, narrowed at the base; the lower leaves 6–12 cm long, lanceolate, denticulate to dentate with 1–2 teeth on each side, on both surfaces glabrous, only on the margins and along the midrib with sparse, pale simple hairs 1–2 mm long; the middle leaves 4–8 cm long, narrowly lanceolate, entire, only on the margins with few simple hairs; the uppermost leaf bract-like and ±glabrous. Synflorescence with 15–30(–40) capitula (and usually some capitula aborted). Synflorescence branches 2–4, confined to the middle and upper halves of stem, with 3–10 capitula. Acladium up to 4 cm long. Peduncles green, erect, with numerous stellate hairs, scattered, black glandular hairs 0.2–0.4 mm long and scattered, grey, dark-based simple hairs 1–1.5 mm long. Bracteoles 2–3, lanceolate, dark green, covered by numerous simple hairs mixed with glandular hairs, and a tuft at the apex. Involucres subglobose at the base, 10–11 mm long, covered by moderately dense indumentum. Involucral bracts in two rows, 1.2–1.4 mm wide at the base, lanceolate, subacute and with a tuft at the apex; the outer bracts dark green, with numerous, pale, dark-based simple hairs 1.7–2.2 mm long and scattered, black glandular hairs 0.5–0.8 mm long (ratio of simple hairs to glandular hairs 2: 1), and with sparse stellate hairs at the base; the inner bracts with wide, pale margins and far less dense indumentum. Ligules yellow, glabrous at the apex. Styles dark.Achenes brown, 3.3–3.5 mm long. Pappus strawgrey. Pollen in anthers absent. Flowering: July.

Affinity: —New species is similar to H. mirekii Szeląg (2006: 118) , from which it differs in its dark styles, longer involucres, green (not glaucous) leaves, narrowly lanceolate cauline leaves, and brown achenes. The morphological differences between both species are stable in the garden-cultivated plants. For the differences between the species of H. sect. Cernua in Romania see the key bellow.

Distribution and habitats: —Endemic to the Şureanu Mountains, Southern Carpathians, known only from the type gathering; nevertheless its occurrence in the adjacent Parâng Mountains has been expected. The population of Hieracium joannei was composed of a few hundred flowering plants growing on a south-facing slope covered by grassy vegetation and Brucenthalia spiculifolia, and on siliceous rocks and crevices along the Picea abies forest margin.

Mode of reproduction: —Agamospermous.

Etymology: —The new species is named in honour of Dr. hab. Jan (Latin: Joannes) Bodziarczyk, University of Agriculture in Cracow, who accompanied me on a field trip to Romania in July 2014.

Figures

FIGURE 1. Holotype of Hieracium joannei (KRAM).

FIGURE 2. Holotype of Hieracium joannei: involucres.

FIGURE 3. Hieracium joannei: flowering plants in the locus classicus.