Page 49 - 《广西植物》2020年第10期
P. 49
1 4 3 2 广 西 植 物 40 卷
markingꎬ outside sparsely puberulentꎬ inside glabrousꎻ
3 Taxonomic Treatment corolla tube tubular to infundibuliformꎬ 2. 4 - 3. 1 cm
longꎬ 7-10 mm in diameter at the mouthꎬ 3-4 mm in
Primulina huangjiniana W. B. Liaoꎬ Q. Fan & diameter at the baseꎻ limb distinctly 2 ̄lippedꎬ adaxial
C. Y. Huangꎬ sp. nov. Fig. 1ꎬ 2 lip 2 ̄lobedꎬ lobes ovateꎬ 8-10 × 5-7 mmꎬ abaxial lip
Similar to Primulina depressaꎬ but differs from it deeply 3 ̄lobedꎬ lobes oval to oblongꎬ 10 - 12 × 5 - 7
by its shorter bracts 2.5- 6 mm long (vs. 15 - 30 mm mm. Stamens 2ꎬ adnate to 1.5-2 cm above the corolla
long)ꎬ calyx lobes subequal (vs. unequal)ꎬ filaments tube baseꎻ filaments linearꎬ 8-13 mm longꎬ geniculate
glandular ̄puberulent above the midpoint and geniculate near the baseꎬ with glandular trichomes above the
near the base ( vs. glabrous and geniculate near the midpointꎻ anthers fused by the entire adaxial surfacesꎬ
middle)ꎬ deeply 2 ̄lobed obdeltoid stigma with two 1.5-3.5 mm longꎬ glabrous. Staminodes 3ꎬ the lateral
linear lobes (vs. slightly 2 ̄lobed lamelliform stigma with ones 2-5.5 mm longꎬ apex capitateꎬ adnate to 1.3-2 cm
two acute ̄triangular lobes )ꎬ and parietal placenta above the corolla tube baseꎬ the middle one 0.5-1 mm
(vs. axile placenta). longꎬ sometimes absentꎬ adnate to 1-1.2 cm above the
Type. CHINA. Guangdong Provinceꎬ Renhua corolla tube baseꎬ glabrousꎻ Disc annularꎬ ca. 1 mm in
Countyꎬ Mount Danxiaꎬ on the moist rocks in forest height. Pistil 2.6-3.2 cm longꎬ ovary conicalꎬ 3-4.5
edgeꎬ30 m a. s. l.ꎬ 20 April 2018ꎬ Q. Fan and Y. mm longꎬ 1 - 2 mm in diameterꎬ densely pubescentꎻ
S. Huang 16997 ( holotype: SYS!ꎻ isotypes: IBK!ꎬ style 2. 6 - 3. 2 cm longꎬ ca. 0. 8 mm in diameterꎬ
IBSC!ꎬ SYS!). pubescentꎻ stigma obdeltoidꎬ deeply 2 ̄lobedꎬ 4-8 mm
Description. Perennial herbs. Rhizome subtereteꎬ longꎬ lobes linear. Capsule ovoid to cylindricalꎬ 4 - 9
0.5 - 2 cm longꎬ 2 - 5 mm in diameterꎬ internodes mm longꎬ 2-3 mm in diameterꎬ densely pubescent.
inconspicuous. Leaves 4 - 10ꎬ crowded at the apex of Distribution and habitat. Primulina huangjiniana
rhizomeꎻ petiole flattenedꎬ (0.5-) 1-4 (-7) cm longꎬ is currently known only from two localities on Mount
2-5 mm wideꎬ pubescentꎻ leaf blade fleshy when freshꎬ Danxiaꎬ Renhua Countyꎬ North Guangdongꎬ China. The
thin chartaceous when driedꎬ ovate to oblong-ellipticꎬ species grows on moist rocks in forest edge or on sunny
(2-) 3-7.5 (-10) × (1-) 1.5-4 ( -5.5) cmꎬ both rocks of the cliff. The associated herb species mainly
surfaces densely pubescentꎬ apex acute to obtuseꎬ base include Microsorum fortunei (T. Moore) Chingꎬ Onychium
cuneateꎬ margin repand or inconspicuously serrateꎻ japonicum (Thunb.) Kze.ꎬ Selaginella davidii Franch.ꎬ
lateral veins 3-4 on each sideꎬ inconspicuous. Cymes S. delicatula (Desv.) Alston and Youngia heterophylla
2- 7 or moreꎬ 1 ̄2 ̄branchedꎬ 1 ̄5 ̄floweredꎻ peduncle (Hemsl.) Babcock & Stebbins.
0.5- 1. 5 cm longꎬ ca. 1 mm in diameterꎬ densely Preliminary conservation status. Only two
pubescentꎻ bracts 2ꎬ oppositeꎬ greenꎬ linear - populations were found with no more than 200 mature
2
lanceolateꎬ 2. 5 - 6 × ca. 1 mmꎬ margin entireꎬ apex individuals in a total area of about 0.5 km . The localities
acuteꎬ densely pubescent on both surfacesꎻ pedicel 2-5 of two populations are over 10 km apart. Thusꎬ the
mm longꎬ ca. 1 mm in diameterꎬ densely species could be considered as Critically Endangered
pubescent. Calyx 5 ̄parted to baseꎻ lobes lanceolateꎬ 6- (CRꎬ B2a) according to IUCN Red List Criteria (IUCNꎬ
12 × 1-1.5 mmꎬ margin entireꎬ both surfaces densely 2017).
pubescent. Corolla 3.5-4.0 cm longꎬ pale blue ̄purple or Phenology. Flowers from March to May and fruits
whiteꎬ with bluish purple stripes insideꎬ upper part of from April to June (observation by QF and JQG in the
the interior of the corolla with a yellowish brown field from March 2017 to November 2018).