Himalaiella lushaiensis Y.S. Chen & Q. Yuan, 2014
publication ID |
https://doi.org/ 10.11646/phytotaxa.173.4.4 |
persistent identifier |
https://treatment.plazi.org/id/83658788-A656-FFB9-F195-08F1FA64FA88 |
treatment provided by |
Felipe |
scientific name |
Himalaiella lushaiensis Y.S. Chen & Q. Yuan |
status |
sp. nov. |
Himalaiella lushaiensis Y.S. Chen & Q. Yuan View in CoL , sp. nov.
Type:— INDIA. [Mizoram], south of Lushai , open grassland, 1372 m, Febuary 1932, M . L . Werger 422 (holotype K!). Figs. 1 View FIGURE 1 , 2 View FIGURE 2 and 3 View FIGURE 3 ( A & C) .
Annual or biennial herbs. Stem 30–50 cm tall, 3–4 mm in diam., solitary, erect, apically branched, sparsely pubescent. Basal and lower stem leaves petiolate; petiole 2–5 cm long, base sheathed; leaf blade ovate to elliptic, 11–13 × 3.5– 4.5 cm, bipinnately divided, abaxially white, conspicuously veined, arachnoid tomentose, gland-dotted, especially so along the veins, adaxially green, scabrous, sparsely strigose, glandular scabrid; primary segments 8–10 pairs, elliptic, apex obtuse and mucronate; secondary lobes 1–3 pairs, obliquely triangular-ovate, sometimes toothed; upper stem leaves sessile, smaller, blade oblong, pinnatisect to pinnately lobed; lateral segments 4–7 pairs, leaf base enlarged and auriculate. Capitula few, usually in a racemiform synflorescence, pedunculate, peduncles 1–6 cm long. Involucre campanulate, 10–15 mm in diam. Phyllaries in 5–6 rows, arachnoid, gland-dotted; outer phyllaries oblong, 5–6 × 1.3–1.5 mm, leafy, gland-dotted, apex densely hairy, obtuse to acute; middle phyllaries oblong, 6–8 × 1.4–1.5 mm, subcoriaceous, deep-brownish hairy, apex acuminate; inner phyllaries narrowly elliptic-linear, deep-brownish hairy, ca. 10 × 1 mm, apex acuminate ( Fig. 4 View FIGURE 4 ). Receptacle bristles subulate, 4–8 mm long. Corolla purple, 9–10 mm long, gland-dotted, tube 4–5 mm long, limb 6–6.5 mm long, lobes 3–3.5 mm long. Achene brown, ca. 4 × 1.4 mm, 4-angled, glabrous, wrinkled, upper part muricate, apical rim forming a conspicuous truncate crown ( Fig. 3 View FIGURE 3 ). Pappus white, 1- seriate, plumose, ca. 9 mm long, basally connate into a ring.
Distribution and habitat:— Himalaiella lushaiensis is a locally endemic species, currently known only from southern Mizo [Lushai] Hills (western range of the Arakan Mountains between western Myanmar and India), Mizoram State, northeastern India ( Fig. 2 View FIGURE 2 ). It grows in open grasslands at altitudes of 1300–2000 m on the top of the Blue Mountain.
Phenology:—Flowering and fruiting in the dry season from November to February.
Etymology:—The specific epithet “ lushaiensis ” is derived from Lushai [now Mizo] Hills, India, where the type material of this species was collected.
Additional specimen examined (paratype): — INDIA. [Mizoram], south of Lushai, top of the Blue Mountain , open grassland, 1829–1981 m, November 1931, M. L . Werger 376 ( K!) .
Discussion:— Himalaiella lushaiensis is most similar to H. natmataungensis Fujikawa (2012: 168) from Myanmar, but differs by its involucre 10–15 mm in diameter, capitula on erect peduncles and in a racemiform synflorescence, peduncles 1–6 cm long, phyllaries usually oblong, apex obtuse to acute; while H. natmataungensis is distinct by its involucre 3–4.5 mm in diameter, capitula nodding and in a corymbiform synflorescence, peduncles 11–30 cm long, phyllaries usualy linear, apex attenuate or aristate. Himalaiella lushaiensis is also similar to H. foliosa ( Edgeworth 1846: 77) Raab-Straube (2003: 391) in its pinnately divided leaves, rugose and muricate achenes with an irregularly toothed crown ( Fig. 3 View FIGURE 3 ), but differs by the stem nearly unbranched, basal leaves petiolate, unwinged, stem leaves distinctly bipinnately divided, primary segments 8–10 pairs, secondary lobes 1–3 pairs, obliquely triangular-ovate, sometimes toothed, and phyllaries lanceolate, broad. A comparison of H. lushaiensis , H. natmataungensis and H. foliosa is given in Table 1.
To facilitate identification of the 15 species currently included in Himalaiella , we herewith provide a key to them on the basis of a survey of both literature and herbarium specimens.
Key to the species of Himalaiella View in CoL (with distribution ranges indicated)
1. Basal and lower stem leaves pinnately or bipinnately divided, terminal lobe not much larger than lateral ones..............................2
– Basal and lower stem leaves lyrate pinnately lobed or lyrate pinnately divided, terminal lobe much larger than lateral ones or blade undivided ..................................................................................................................................................................................7
2. Plants almost stemless; capitula few, clustered in center of leaf rosette .............................................................................................. .................................................................................................................... H. yakla View in CoL [ Bhutan, India (Sikkim), Nepal, China (Tibet)]
– Plants with tall stems; capitula numerous, in a racemiform, paniculiform, or corymbose synflorescence........................................3
3. Leaf blade shallowly lobed or toothed; outer phyllaries herbaceous H. peguensis View in CoL [ Myanmar, Thailand, China (Guizhou, Yunnan)]
– Leaf blade deeply or shallowly lobed; outer phyllaries coriaceous ...................................................................................................4
4. Leaf blade sinuately lobed, margin mucronate, abaxially glabrous, sessille; capitula in lax terminal corymbs or solitary axillary ... ................................................................................................................................. H. chenopodiifolia View in CoL [ Afghanistan, NW Pakistan]
– Leaf blade deeply lobed, margin dentate, abaxially white tomentose, petiolate or winged; capitula in sparse racemiform or paniculiform synflorescence ..................................................................................................................................................................5
5. Stem profusely branched; phyllaries linear; basal leaves sessile, bipinnate blade with 2–7 pairs of primary segments, segment margin entire or toothed, but never forming secondary lobes............................................... H. foilosa [NW India, Nepal, Kashmir]
– Stem little branched or unbranched; phyllaries oblong, lanceolate or linear; basal leaves petiolate and unwinged; lower leaves petiolate, bipinnate blade with 9–20 pairs of primary segments and with secondary lobes ..............................................................6
6. Stem little branched; involucre 3–4.5 cm in diameter; capitula nodding; peduncle 11–30 cm long; phyllaries linear, apex attenuate or aristate .................................................................................................................................... H. natmataungensis View in CoL [ Myanmar]
– Stem nearly unbranched; involucre 1–1.5 cm in diameter; capitula erect; peduncle 1–6 cm long; phyllaries oblong or lanceolate, apex obtuse to acute .................................................................................................................................... H. lushaiensis View in CoL [NE India]
7. Stem simple, scapiform with reduced leaves; capitulum always solitary; leaf blade adaxially grayish green, arachnoid tomentose. .............................................................................................................................. H. abnormis View in CoL [NW India, W Nepal, China (Tibet)]
– Stem branched or rarely simple, leafy, not scapiform; capitula numerous or solitary; leaf blade adaxially green, scabrous, strigose, or glabrescent ............................................................................................................................................................................8
8. Receptacle with bristles and long subulate paleae; pappus brown; leaf abaxially glabrous ................................................................ ............................................................................................................ H. auriculata View in CoL [ Bhutan, India, Nepal, Kashmir, China (Tibet)]
– Receptacle with bristles but without paleae; pappus white or straw-colored; leaf abaxially white hairy or tomentose....................9
9. Plants usually profusely branched, capitula numerous; outer phyllaries with a green, herbaceous appendage...............................10
– Plants fewly branched, with 2–4 capitula; outer phyllaries without appendage, long acuminate ...................................................11
10. Involucre 1–2 cm in diameter; capitula solitary or clustered, subsessile or shortly pedunculate; corolla 1–1.2 cm; pappus 0.8–1 cm .................................. H. nivea View in CoL [ India, Laos, Myanmar, Nepal, N Thailand, N Vietnam, China (Guizhou, Sichuan, Tibet, Yunnan)]
– Involucre 2–4 cm in diameter; capitula mostly solitary, long pedunculate; corolla 1.5–2 cm; pappus 1.4–1.6 cm ............................ ............................................................ H. deltoidea View in CoL [ Bhutan, India, Laos, Myanmar, Nepal, Pakistan, Thailand, Vietnam, S China]
11. Leaf blade unlobed, margin dentate ............................................................................................... H. qinghaiensis View in CoL [ China (Qinghai)]
– Leaf blade lyrate lobed, margin entire or toothed ............................................................................................................................12
12. Capitula few, usually 3–9, often long-peduncled, 2–3.5 cm wide; phyllaries greenish; achenes transversely muricate..................... .................................................................. H. heteromalla View in CoL [ Afghanistan, NW Pakistan, N India, Nepal, Bhutan, Kashmir, SE Iran]
– Capitula usually numerous in corymbs, 0.5–2 cm wide; phyllaries brownish; achenes smooth or longitudinally ribbed ..............13
13. Capitula cylindric; phyllaries woolly-hairy............................. H. albescens View in CoL [ Afghanistan, NW Pakistan, N India, Nepal, Kashmir]
– Capitula campanulate; phyllaries nearly glabrous............................................................................................................................14
14. Leaves mostly basal, usually lyrate-pinnatifid; achene apex faintly dentate ................. H. chitralica View in CoL [E Afghnistan, NW Pakistan]
– Leaves sparsely arranged along the stem, usually lanceolate, often pinnately divided, base prominently amplexicaul; achene apex prominently dentate ............................................................................................................ H. afghana View in CoL [E Afghnistan, NW Pakistan]
M |
Botanische Staatssammlung München |
L |
Nationaal Herbarium Nederland, Leiden University branch |
K |
Royal Botanic Gardens |
A |
Harvard University - Arnold Arboretum |
C |
University of Copenhagen |
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