Clematis hastata Finet & Gagnepain (1903: 527)

Huang, Qiao-Lan, Fei, Wen-Qun, Yu, Qi, Yuan, Qiong & Yang, Qin-Er, 2024, Clematis alopecuros (Ranunculaceae), another new synonym of C. hastata from China, Phytotaxa 672 (2), pp. 149-162 : 156-161

Clematis hastata Finet & Gagnepain (1903: 527) . Figs. 1−9 .

Type:— CHINA. Chongqing: Chengkou, alt. 1400 m, 2 April 1892, P.G. Farges 1155 (holotype P!). Fig. 3 .

= Clematis glabrifolia Sun & Yan in Yan & Sun (1992: 327).

Type:— CHINA. Gansu: Wenxian , between Bikou and Fanba, roadside, alt. 300 m, 27 March 1988, X.D. Wang & K. Sun 251 (holotype NWNU, not seen; isotype PE!). Fig. 5D .

= Clematis hastata var. micrantha Wang (2006: 327) .

Type:— CHINA. Shaanxi: Hanzhong, Nanliugou, cliff side, alt. 700 m, 17 March 1959, P.Y. Li 1072 (holotype WUK!, isotype NAS!). Fig. 6B, C .

= Clematis alopecuros Gan & Li (2024: 75) , syn. nov.

Type:— China. Hubei, Zhuxi county, Huiwan town, Chuanfeng village, Fenghuangzui, alt. 380 m, 15 March 2023, Q.L. Gan 3322-7 (holotype HIB!), Q.L. Gan 3322-1 (isotype HIB!), Q.L. Gan 3322-3 (isotype HIB!), Q.L. Gan 3322-4 (isotype HIB!), Q.L. Gan 3322- 5 (isotype HIB!), Q.L. Gan 3322-6 (isotype HIB!). Figs. 1 , 2A, B .

Description:—Vines woody. Branches shallowly 8-grooved, glabrous; bracts of axillary floral buds of old branches narrowly triangular to ovate, 4−8 mm long, papery, sparsely puberulous toward apex. Leaves pinnate, 5−7-foliolate, rarely ternate, glabrous; petiole 2−5.5 cm long; leaflet blades of lower pair narrowly ovate, 4−6 (−14) cm long, 3−4.5 cm broad, subleathery, 3-parted or unequally 2-parted, base subcordate, margin entire, apex acute to more or less obtuse; leaf blades of upper pair triangular-linear to narrowly triangular, 2.5−5 cm long, 0.9−2 cm broad, base subcordate to truncate, margin entire and undivided; midvein abaxially more or less prominent. Flowers 2−7, arising from axillary buds, 2.5−4 cm in diameter. Pedicel 4−10.5 cm long, pubescent. Sepals 4−6, white or abaxially tinged pinkish, spreading, broadly oblanceolate to oblong, 1.3−2.2 cm long, 0.4−1 cm broad, abaxially densely appressed puberulous, adaxially glabrous, apex obtuse to rounded. Stamens ca. 8 mm long, glabrous; anthers narrowly oblong, 2−5 mm long, apex obtuse or obscurely apiculate. Ovaries pubescent. Style 5−8 mm long, densely villous. Achenes compressed, ca. 3.5 mm long, ca. 3 mm broad, blackish when mature, pubescent; persistent style white plumose.

Phenology:—Flowering from February to April; fruiting from April to May. A single specimen, J.Q. Xing 16486 (WUK; Fig. 6A ), from Danjiangkou (previously known as Junxian) in western Hubei, was recorded to be collected on 24 August 1959 on the field label. The flowering time of the Danjiangkou population of Clematis hastata needs to be verified.

Distribution and habitat:— Clematis hastata is currently known to occur in eastern Chongqing (Chengkou), southern Gansu (Wenxian), western Hubei (Danjiangkou, Zhuxi), southwestern Shaanxi (Hanzhong), and northeastern and northern Sichuan (Guangyuan, Nanjiang, Qingchuan), i.e. the Daba mountains region in central China ( Fig. 10 ). It grows on slopes or cliffs in ravines at altitudes of 300−1400 m.

Additional specimens examined:— CHINA. Gansu: Wenxian, Y. Li & S.A. Wang 1 (NAS), Y. Li & S.A. Wang 2 (NAS), T. P Wang 18907 (WUK), T. P Wang 20539 (WUK), J.Q. Xing 21898 (WUK). Hubei: Danjiangkou (previously known as Junxian), J.Q. Xing 16486 (WUK); Zhuxi, Q.L. Gan 3323-2 (HIB), Q.L. Gan 3323-3 (HIB). Sichuan: Guangyuan, Z.P. Wei 3941 (WUK), Z.P. Wei 39 63 (WUK); Nanjiang, Anonymous 74 (SM); Qingchuan, J.F. Rock 12037 (A, K, P), Q. Yu 0100 (IBSC).

Figures

FIGURE 1. Holotype and isotype sheets of Clematis alopecuros (= C. hastata). China, Hubei, Zhuxi, Q.L. Gan 3322. A. Q.L. Gan 3322- 7 (HIB, holotype); inset: flowers. B. Q.L. Gan 3322-1 (HIB, isotype). C. Q.L. Gan 3322-3 (HIB, isotype). D. Q.L. Gan 3322-4 (HIB, isotype).

FIGURE 2. Isotype and paratype sheets of Clematis alopecuros (= C. hastata). China, Hubei, Zhuxi, Q.L. Gan 3322 and Q.L. Gan 3323. A. Q.L. Gan 3322-5 (HIB, isotype). B. Q.L. Gan 3322-6 (HIB, isotype). C. Q.L. Gan 3323-2 (HIB, paratype). D. Q.L. Gan 3323-3 (HIB, paratype).

FIGURE 3. Holotype sheet of Clematis hastata. China, Chongqing (previously belonging to Sichuan), Chengkou, P.G. Farges 1155 (P); inset a: stem node, with the red arrows indicating the dilated and connate petiole bases; inset b: flower.

FIGURE 4. Two sheets of the collection J.F. Rock 12037 of Clematis hasatata from Qingchuan in Sichuan, China.A. Sheet at K. B. Sheet at P. C. Flowers from the K sheet. D. Node from the K sheet.

FIGURE 5. Four selected specimens of Clematis hastata from Wenxian in Gansu, China. A. Y. Li & S.A. Wang 1 (NAS); inset a: stem node, with the red arrows indicating the dilated and connate petiole bases; inset b: flower. B. Y. Li & S.A. Wang 2 (NAS); inset a: stem node, with the red arrows indicating the dilated and connate petiole bases; inset b: flower. C. Y. Li & S.A. Wang 2 (NAS); inset a: stem node, with the red arrows indicating the dilated and connate petiole bases; inset b: flower. D. K. Sun & X.D. Wang 251 (PE; isotype sheet of C. glabrifolia (= C. hastata)).

FIGURE 6. Four selected specimens of Clematis hastata from Hubei, Shaanxi and Sichuan, China. A. Hubei, Danjiangkou (previously known as Junxian), J.Q. Xing 16486 (WUK). B. Shaanxi, Hanzhong, P.Y. Li 1072 (WUK; holotype of C. hastata var. micrantha (= C. hastata)); inset: flower. C. Shaanxi, Hanzhong, P.Y. Li 1072 (NAS; isotype of C. hastata var. micrantha (= C. hastata)); inset: stem node, with the red arrows indicating the dilated, connate petiole bases. D. Sichuan, Nanjiang, Anonymous 74 (SM).

FIGURE 7. Selected specimens of Clematis hastata from Qingchuan in Sichuan China, Q. Yu 0100 (IBSC).A. Sheet 1; inset a: stem node, with the red arrows indicating the dilated, connate petiole bases; inset b: flower.B. Sheet 2; inset: stem node, with the red arrows indicating the dilated, connate petiole bases. C. Sheet 3; inset: flower.

FIGURE 8. Clematis hastata in the wild (China, Hubei, Zhuxi). A. Flowering branch; inset: dilated and connate petiole bases. B, C. Flowering branches. D. Leaves. E. Flower (lateral view). F. Flower (lateral view). Photographed by Qi-liang Gan.

FIGURE 9. Clematis hastata in the wild (China, Sichuan, Qingchuan).A. Habitat and habit. B. Leaves. C. Flowering branch. D. Flowers. Photographed by Qi Yu.

FIGURE 10. Distribution of Clematis hastata (●). The black arrow indicates the type locality of this species, i.e. Chengkou in Chongqing, China, and the red arrow indicates the type locality of C. alopecuros (= C. hastata), i.e. Zhuxi in Hubei, China.