Jurinea in Flora of China @ efloras.org

14. Jurinea Cassini, Bull. Sci. Soc. Philom. Paris. 1821: 140. 1821.

苓菊属 ling ju shu

Authors: Zhu Shi & Eckhard von Raab-Straube

Pilostemon Iljin.

Herbs, perennial [or shrublets]. Leaves undivided to pinnatisect. Capitula solitary or several in a corymbiform synflorescence. Involucre bowl-shaped, ovoid, campanulate, hemispheric, or cylindric. Phyllaries herbaceous or leathery, appressed or reflexed. Receptacle with broad rigid shortly acuminate scales or bristles. Corolla red to purple, with sessile glands. Anther tails lacerate-caudate. Style branches short, divergent. Achene isodiametric, narrowly obovoid, narrowly ellipsoid, or obconic, 3- or 4-angled, glabrous or glandular, sometimes spinulose-tuberculate, apical rim forming a crown. Pappus bristles in several rows, white, scabrid, barbellate, or plumose, unequal in length, sometimes 2-5 inner bristles much longer than others; bristles inserted on a conspicuous conical cupule, persistent or caducous as a whole.

About 250 species: NW Africa, C and SW Asia, Europe; ten species (one endemic) in China.

The genus Pilostemon differs from Jurinea only in the pilose anther connectives. All other diagnostic characters given in the protologue of the genus, especially concerning the receptacle, achene, and pappus structure, can be found at least in some sections of Jurinea as well. Pilostemon is therefore not accepted in this treatment.

1 Achene not spinulose-tuberculate (2)

+ Achene spinulose-tuberculate (4)

2 (1) Leaf blade linear-filiform, 1-2 mm wide; involucre obconic; pappus plumose, 1-1.5 cm. 3 J. filifolia

+ Leaf blade broadly linear to elliptic, more than 3 mm wide; involucre cylindric or bowl-shaped; pappus scabrid or barbellate, 0.8-1.2 cm (3)

3 (2) Leaf blade broadly linear, abaxially grayish white, adaxially green, undivided; involucre cylindric; phyllaries scarious. 1 J. multiflora

+ Leaf blade elliptic, obovate, or ovate, green to grayish green, almost concolorous, pinnately dentate, pinnately lobed, or pinnately divided; involucre bowl-shaped; phyllaries leathery. 2 J. mongolica

4 (1) Pappus elements not connate into a ring, persistent (5)

+ Pappus elements basally connate into a ring, caducous (7)

5 (4) Outer and middle phyllaries with reflexed or slightly bent apex. 6 J. dshungarica

+ Outer and middle phyllaries straight, appressed, apex not reflexed (6)

6 (5) Involucre cylindric, 1.2-1.5 cm in diam.; leaf blade grayish green, almost concolorous, arachnoid floccose. 4 J. adenocarpa

+ Involucre bowl-shaped, 2-3 cm in diam.; leaf blade abaxially grayish white and densely tomentose, adaxially green to pale green and glabrous or sparsely arachnoid tomentose. 5 J. lanipes

7 (4) Phyllaries straight, appressed, apex not reflexed. 7 J. lipskyi

+ Outer and middle phyllaries with reflexed to patent apex (8)

8 (7) Herbs (10-)20-45 cm tall; leaf blade of rosette leaves 4-11 × 1-3 cm, green to grayish white, almost concolorous. 10 J. chaetocarpa

+ Herbs stemless or with shorter stems 2-10(-20) cm tall; leaf blade of rosette leaves 2-4 × 0.3-1 cm, abaxially grayish white, adaxially green (9)

9 (8) Herbs stemless or shortly stemmed, to 10 cm tall; leaf blade of rosette leaves lyrately pinnatipartite, lyrately pinnatisect, or pinnately divided, usually some undivided; outer phyllaries sparsely arachnoid, glabrescent, 5-15 mm. 8 J. algida

+ Herbs with developed stems, 7-18 cm tall; leaf blade of rosette leaves pinnately dentate to pinnately lobed; outer phyllaries densely arachnoid, 2-5 mm. 9 J. kaschgarica

Lower Taxa