Heracleum species

Duran, Ahmet, Lyskov, Dmitry, Samigullin, Tahir & Paksoy, Mehmet Yavuz, 2024, Heracleum munzurense (Apiaceae), a new species from East Anatolia, Turkey and taxonomic position of Tetrataenium lasiopetalum, Phytotaxa 663 (5), pp. 267-282 : 278

Key to closely related Heracleum species

1. Lower leaves simple, lobed ....................................................................................................................................... H. lasiopetalum

– Lover leaves compound...................................................................................................................................................................... 2

2. Stem 3–14 cm tall; lamina of lower leaves 1.5–3 cm long; lateral leaflets 0.4–1 cm long; stems 0.5–1.2 mm diameter below, procumbent; rays 2–3, glabrous ...................................................................................................................................... H. pastinaca

– Stem 15–85 cm tall; lamina of lower leaves (4–) 6–15 cm long; lateral leaflets 1–7 cm long; stems 1.5–5 mm diameter below, erect; rays 3–12, pubescent .......................................................................................................................................................................... 3

3. Flowers strongly radiant, the outer petals 8–12 mm, glabrous outside; fruits 4–6 × 3.5–5 mm, glabrous to puberulent; dorsal vittae without septata............................................................................................................................................................... H. apiifolium

– Flowers regular or more shortly radiant, the outer petals 2.5–3 mm, puberulous outside; fruits 9–10 × 7–9 mm, antrorsely scabrid-setulose; dorsal vittae with septata ............................................................................................................................. H. munzurense