Zeravschania, Korovin, 1948

Pimenov, Michael G. & Kljuykov, Eugene V., 2013, Two new species of Zeravschania (Umbelliferae) and some additional notes on the genus, Phytotaxa 130 (1), pp. 25-33 : 32

Key to the species of Zeravschania :

1. Stem covered with short hairs in lower part ................................................................................................................ 2

- Stems completely glabrous in lower part ..................................................................................................................... 3

2. Plants polycarpic with branched rootstocks; leaves subbipinnate, petiolate; leaf segments with petiolules; umbel rays 1–1.5 cm long .................................................................................................................................... Z. kopetdaghensis

- Plants monocarpic with tap-roots; leaves pinnate, with very short petioles; leaf segments sessile; umbel rays 2.5–3.5 cm long .................................................................................................................................................... Z. stricticaulis

3. Petals white .................................................................................................................................................................. 4

- Petals yellow or greenish-yellow .................................................................................................................................. 9

4. Terminal leaf segments small, 3–4 mm long ............................................................................................................... 5

- Terminal leaf segments relatively large, 5–50 mm long............................................................................................... 6

5. Stems hollow; leaves long-persistent, glabrous; mericarp ribs with secretory ducts ..................................................... ..................................................................................................................................... Z. regeliana Korovin (1948: 28)

- Stems solid; leaves soon withering, covered with short rigid hairs; mericarp ribs without secretory ducts ................. ............................................................................................................................... Z. scabrifolia Pimenov (1983: 375)

6. Stems solid, terminal leaf segments 30–50 mm long, 18–25 mm wide, shallowly lobed, coriaceous; umbels with 3–5 rays ................................................................................................................................................................ Z. latifolia

- Stems fistulose, terminal leaf segments 5–10 mm long, 4–8 mm wide, deeply dissected, soft; umbels with (5–)6–12 rays ............................................................................................................................................................................... 7

7. Calyx teeth broadly triangular, obtuse; stylopods conical ........... Z. ferulifolia ( Gilli 1959: 204) Pimenov (1987: 460)

- Calyx teeth inconspicuous; stylopods short-conical or dish-shaped ........................................................................... 8

8. Plants of high altitudes with thick, branched rootstock; stylopods dish-shaped ............................................................ ........................................................................................ Z. minjanensis ( Rechinger 1963: 88) Rechinger (1987: 461)

- Plants of low altitudes with taproots; stylopods short-conical ....................................................................................... ................................................................................................... Z. aucheri ( Boissier 1844: 315) Pimenov (1987: 459)

9. Terminal leaf segments lanceolate, short ................ Z. pauciradiata ( Tamamschjan 1936: 225) Pimenov (1987: 459)

- Terminal leaf segments long, narrowly linear to filiform ........................................................................................... 10

10. Leaves rigid; bracteoles white-membranous at the margin, lanceolate to ovate ............................................................ ........................................................................................ Z. membranacea ( Boissier 1844: 315) Pimenov (1987: 458)

- Leaves soft; bracteoles herbaceous, linear...................................................................................................................... ........................................... Z. knappii ( Bornmueller 1910: 121) Pimenov & Kljuykov (in Pimenov et al. 2007: 497)