296 
Card. Bull. Singapore 69(2) 2017 
we propose two new species: Oreocharis argyrophylla W.H.Chen, H.Q.Nguyen & 
Y.M.Shui (Fig. 1, 2) and O. blepharophylla W.H.Chen, H.Q.Nguyen & Y.M.Shui (Fig. 
3, 4). The former species is most similar to Oreocharis argyreia Chun ex K.Y.Pan and 
O. hirsuta Barnett, and the latter to O. magnidens Chun ex K.Y.Pan and O. curvituba 
J.J.Wei & W.B.Xu, but differ from these species in the characters listed in Tables 1 and 
2. The two new species occur in close proximity to each other in the Van Ho district in 
Son La province in north-western Vietnam. 
Below, CPC refers to the Herbarium of the Center for Plant Conservation, Vietnam 
Union of Science and Technology Associations, Hanoi. 
Oreocharis argyrophylla W.H.Chen, H.Q.Nguyen & Y.M.Shui, sp. nov. 
The new species is most similar in leaf characteristics to Oreocharis argyreia Chun 
ex K.Y.Pan but differs from it in having yellow flowers (vs purple), corolla narrowly 
infundibuliform (vs tubiform) and 2.5-3.1 cm long (vs 2-2.3 cm), and coherent anthers 
(vs free). In flower characteristics it is also similar to Oreocharis hirsuta Barnett in 
its yellow and tubular corolla but differs from it in its deeply bilabiate corolla limb 
(vs shallowly bilabiate) and coherent anthers (vs free). - TYPE: Vietnam, Son La 
province, Van Ho district, Tan Xuan municipality, Cot Moc village, territory of Xuan 
Nha nature reserve, eastern slopes of Pha Luong Mountain, at an elevation of 1000- 
1400 m, 20°40'33.3"N 104°39'00.3"E, 15 November 2013, in flower, Averyanov, L., 
Hiep, N.T., Khang, N.S., Thang, N.D. & Qui, L.D. CPC 7175 (holotype KUN; isotypes 
CPC, LE). (Fig. 1, 2) 
Perennial herb with very short stem. Leaves numerous, rosulate, petiolate; petiole 
4-9 cm, densely appressed pubescent; blade narrowly obovate to broadly lanceolate, 
12-18 x 4.5-6.5 cm, both surfaces densely pubescent with appressed silvery hairs 
especially adaxially, base narrowly cuneate, apex acute to short acuminate, margin 
serrulate above middle of leaf blade, lateral veins 6-8 on each side of midrib, distinct. 
Inflorescences axillary, 3^1-branched, cymes 3-many-flowered; peduncle 8-12 cm 
long, pubescent with appressed hairs; bracts 2, linear-lanceolate, 10-13 x 1-2 mm, 
apex tapering, margin entire, pubescent and villous abaxially, glabrous adaxially; 
pedicels 0.7-1.8 cm long, white pubescent. Calyx of 5 lobes free to base; lobes 
equal, linear, 6-8 x c. 1 mm, margin entire, pubescent with appressed hairs abaxially, 
glabrous adaxially. Corolla yellow, tubular, apically infundibuliform, 2.5-3.1 cm long, 
outside glandular pubescent, glabrous inside; tube gradually slightly ampliate from 
the middle, 1.6-2.2 cm long, 2.8-3 mm in diam. at base, 6-6.2 mm in diam. and not 
constricted at the throat; limb 2-lipped; adaxial lip 2-lobed, dissected from near base 
of the adaxial lip, lobes ovate, apices rounded or obtuse, 5.8-6 x 4.1-4.3 mm; abaxial 
lip 3-lobed, lobes ovate, apices rounded or obtuse, subequal, median lobe slightly 
larger, 7.4-7.5 x 6.1-6.2 mm, lateral lobes 7-7.1 x 4.4^1.7 mm. Stamens 4, anthers 
coherent in pairs, included, adaxial stamens 8-9 mm long, adnate to corolla tube 
1.5-1.6 cm from base, abaxial stamens 1.4-1.5 cm long, adnate to corolla tube 5-5.5 
mm from base; filaments glabrous; anthers basifixed, subglobular, 2-locular, dehiscing 
