Page 52 - 《广西植物》2020年第10期
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10 期                     黄翠莹等: 广东报春苣苔属一新种———黄进报春苣苔                                        1 4 3 5


    Table 1  Diagnostic character differences between Primulina huangjiniana sp. nov. and its close relatives P. depressa

    Characters       P. huangjiniana                         P. depressa
    Rhizome          0.5-2 cm longꎬ 2-5 mm in diameter       1-3.5 cm longꎬ 6-12 mm in diameter

    Leaf blade       Ovate to oblong ̄ellipticꎬ (2-) 3-7.5 ( -10) ×  Broadly lanceolate to oblongꎬ 8-20 × 3-7 cm
                     (1-) 1.5-4 ( -5.5) cm
    Petiole          (0.5-) 1-4 ( -7) cm long                4-10 cm long
    Bracts           2.5-6 × ca. 1 mm                        15-30 × 1.5-3 mm
    Calyx lobes      Subequalꎬ 6-12 × 1-1.5 mm               Unequalꎬ 13-2 × 1.5-2 mm
    Corolla          3.5-4 cm longꎬ abaxial lip 3 ̄partiteꎬ and lobes oblong  4.5-5 cm longꎬ abaxial lip 3 ̄lobedꎬ and lobes rounded
    Filaments        With glandular trichomes above the midpointꎬ  Glabrousꎬ geniculate near the midpoint
                     geniculate near the base
    Stigma           Obdeltoidꎬ deeply 2 ̄lobedꎬ and lobes linear  Lamelliformꎬ slightly 2 ̄lobedꎬ and lobes acute-triangular
    Placenta         Parietal placenta                       Axile placenta



                    Key to differentiate the new species and other species from
                               Mount Danxia of Guangdongꎬ China

   1. Corolla yellowishꎬ smallerꎬ 12-15 mm long   Primulina danxiaensis

   1. Corolla non ̄yellowꎬ biggerꎬ≥25 mm long   2
     2. Leaf blade margin serratus to dentate   3
     2. Leaf blade margin entire   5
       3. Peduncle 6-28 cm long or longerꎬ corolla inside purple ̄stained    P. fimbrisepala
       3. Peduncle ≤5 cm long or shorterꎬ corolla inside no purple ̄stained   4
         4. Bracts 15-30 × 1.5-3 mmꎬ corolla 4.5-5 cm long   P. depressa
         4. Bracts 2.5-6 × ca. 1 mmꎬ corolla 3.5-4 cm long    P. huangjiniana
           5. Leaf blade orbicular ̄ovate to orbicular ̄reniformꎬ bracts narrowly triangularꎬ 4-6 × 0.8-1 mm
                   P. rotundifolia

           5. Leaf blade ovate to elliptic or obovateꎬ bracts ovate to orbicular ̄ovateꎬ 10-45 × 8-28 mm 
                    P. eburnea


   Guangdong Province ( Hookerꎬ 1892)ꎬ but without   piece of yellowish brown marking on the upper part of
   detailed location. In factꎬ it is a very common species  the interior of the corollaꎬ and a relatively smaller
   on the moist rocks of Mount Danxiaꎬ but interestinglyꎬ  capsules (less than ca. 1 cm long in length) compared

   it never grows together with P. huangjiniana. It had  to other Primulina species having large corolla which
   been mistaken to be P. depressa before anatomical  usually have longer linear capsules with the length 1-5
   studies were done to find its parietal placenta differed  cm ( except the previous Chiritopsis and Wentsaiboea
   from P. depressa’s axile placenta.                species). Howeverꎬ Primulina huangjiniana can be
       The two species share some similar charactersꎬ  readily distinguished from P. depressa by its slender
   e. g. peduncles usually shorter than the petioles that  rhizome (2-5 mm vs. 6-12 mm in diameter)ꎬ shorter
   makes the flowers appear nestled among the leavesꎬ a  leaf blade (3-7.5 cm long vs. 8-20 cm long) and bracts
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