Thalictrum fusiforme (Ranunculaceae), described from southeastern Xizang (Tibet), China, is merged with T. rostellatum, a Sino-Himalayan species Author Zeng, You-Pai 0000-0003-3259-8011 Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, Guangdong, China & Center of Conservation Biology, Core Botanical Gardens, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, Guangdong, China & University of Chinese Academy of Sciences, Beijing 100049, China & University of Chinese Academy of Sciences, Beijing 100049, China & zengyoupai @ scbg. ac. cn; https: // orcid. org / 0000 - 0003 - 3259 - 8011 zengyoupai@scbg.ac.cn Author Yuan, Qiong 0000-0003-2613-5045 Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, Guangdong, China & Center of Conservation Biology, Core Botanical Gardens, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, Guangdong, China & University of Chinese Academy of Sciences, Beijing 100049, China & yuanqiong @ scib. ac. cn; https: // orcid. org / 0000 - 0003 - 2613 - 5045 yuanqiong@scib.ac.cn Author Yang, Qin-Er 0000-0002-6261-0731 Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, Guangdong, China & Center of Conservation Biology, Core Botanical Gardens, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, Guangdong, China & University of Chinese Academy of Sciences, Beijing 100049, China & qeyang @ scib. ac. cn; https: // orcid. org / 0000 - 0002 - 6261 - 0731 qeyang@scib.ac.cn text Phytotaxa 2022 2022-05-12 545 3 234 260 journal article 55548 10.11646/phytotaxa.545.3.1 c94f1ba3-0cbf-40cd-bb00-10652b30a214 1179-3163 6541490

TABLE 1. Morphological comparison of Thalictrum atriplex, T. fusiforme (= T. rostellatum), and T. rostellatum.

	T. atriplex	T. fusiforme	T. rostellatum
Stem	40‒100 cm tall, glabrous	80‒100 cm tall, glandular-pubescent	40‒100 cm tall, glandular-
			pubescent
Leaf	3‒4-ternate; rachis glabrous	2‒3-ternate; rachis glandular-pubescent	2‒3-ternate; rachis glandular-
			pubescent
Leaflet	0.8–3 cm long, 0.8–3 cm broad,	1‒1.9 cm long, 1‒1.8 cm broad,	0.8‒1.7 cm long, 0.8‒1.7 cm
	ovate, obliquely ovate or broadly	suborbicular, broadly obovate or	broad, broadly obovate, obliquely
	ovate, 3-lobate, glabrous	broadly ovate, 3-lobate, both sides	broadly obovate, suborbicular or
		more or less glandular-pubescent	broadly ovate, 3-lobate, both sides
			more or less glandular-pubescent
Inflorescence	a panicle composed of several	a paniculiform compound cyme;	a paniculiform compound cyme;
	raceme-like branches; peduncle	peduncle glandular-pubescent	peduncle glandular-pubescent
	glabrous
Pedicel	1‒5 mm long, glabrous	5‒16 mm long, glandular-pubescent	3‒20 mm long, glandular-
			pubescent
Flower	bisexual, yellowish green	bisexual, white	bisexual, white or tinged with pink
Sepal	4, 2‒2.5 mm long, 1.3‒1.8 mm broad,	4 or 5, 3.5‒ 4 mm long, 2‒2.5 mm	4 or 5, 2.8‒4 mm long, 2‒3 mm
	elliptic, narrowly oblong or narrowly	broad, broadly elliptic, abaxially	broad, broadly elliptic or ovate,
	obovate, glabrous	sparsely glandular-pubescent	abaxially sparsely glandular-
			pubescent
Stamen	5‒16, 2.5‒4 mm long; filaments 2‒3.5	8‒10, 3‒4 mm long; filaments 2‒3 mm	8‒14, 3‒4 mm long; filaments 1.8‒
	mm long, narrowly oblanceolate;	long, narrowly oblanceolate-linear;	3 mm long, narrowly oblanceolate-
	anthers 0.5‒1 mm long, ca. 0.4 mm	anthers 0.8‒1.2 mm long, ca. 0.5 mm	linear; anthers 0.8‒1.2 mm long,
	broad, ovate or elliptic	broad, narrowly oblong	ca. 0.5 mm broad, narrowly oblong
Carpel	4–8, glabrous, subsessile; ovary	4‒6, glabrous, subsessile; ovary	3‒9, glabrous, subsessile; ovary
	obliquely compressed-ovoid; style ca.	obliquely narrowly obovate; style ca. 2	obliquely narrowly obovate;
	1.5 mm long, uncinate or circinate at	mm long, uncinate or circinate at apex	style ca. 2 mm long, uncinate or
	apex		circinate at apex
Achene	3.5‒5 mm long, glabrous, subsessile;	7‒8 mm long, glandular-pubescent,	7‒8 mm long, glandular-
	stipe 0.1‒0.3 mm long; body	conspicuously stipitate; stipe ca. 0.5	pubescent, conspicuously stipitate;
	obliquely compressed-ovoid; style	mm long; body narrowly lunate-	stipe ca. 0.5 mm long; body
	persistent, recurved, uncinate or	fusiform, slightly compressed; style	narrowly lunate-fusiform, slightly
	circinate at apex	persistent, uncinate or circinate at apex	compressed; style persistent,
			uncinate or circinate at apex