foc
《中国植物志》英文修订版
Flora of China
  FOC Vol.19 (2011)              | Family List  Acanthaceae  PDF Pararuellia  PDF   |  eFloras.org Link Font:+ Big | - Small
   12. Pararuellia  Bremekamp & Nannega-Bremekamp Verh. Kon. Ned. Akad. Wetensch., Afd. Natuurk., Sect. 2. 45(1): 25. 1948.
地皮消属   di pi xiao shu
  
Authors:Authors: Jia-qi Hu & Thomas F. Daniel

  

Herbs, perennial. Stems short. Leaves opposite, rosulate, petiolate; leaf blade margin undulate, crenulate, or rarely subentire. Inflorescences terminal, spikes or thyrses; bracts usually subleaflike; bracteoles present. Flowers sessile. Calyx subequally to equally 5-lobed. Corolla white, bluish, or pink; tube basally cylindric and slender, apically expanded into a throat; limb 5-lobed; lobes subequal, contorted in bud, apex rounded or obtuse. Stamens 4, didynamous, inserted at base of throat; filaments glabrous; anthers 2-thecous; thecae usually widely separated by a broad connective, ± parallel; staminodes absent. Ovary glabrous, with 4-8 ovules per locule; style pubescent; stigma pubescent, 2-cleft, upper lobe very short or reduced. Capsule cylindric, not stipitate, 8-16-seeded; retinacula present. Seeds lenticular, pubescent with hygroscopic hairs.

About ten species: SE Asia, China; five species (all endemic) in China.

Pararuellia is purported to differ from Ruellia by its pollen, which has "minute prickles, papillae or granules (not a honey-combed pattern)" (C. B. Clarke, J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 74: 649. 1908) or at least papillae on the muri of reticulations (C. C. Hu et al., Acta Phytotax. Sin. 43: 123-150. 2005). Because such structures are also known from some species of Ruellia (C. A. Furness & M. C. Grant, Grana 35: 231-239. 1996), the generic status of Pararuellia is questionable and deserves additional study.

Pararuellia is purported to differ from Ruellia by its pollen, which has "minute prickles, papillae or granules (not a honey-combed pattern)" (C. B. Clarke, J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 74: 649. 1908) or at least papillae on the muri of reticulations (C. C. Hu et al., Acta Phytotax. Sin. 43: 123-150. 2005). Because such structures are also known from some species of Ruellia (C. A. Furness & M. C. Grant, Grana 35: 231-239. 1996), the generic status of Pararuellia is questionable and deserves additional study.

  
1Bracts longer than rachis internodes, imbricate, homomorphic; spikes cylindric; flowers imbricate on rachis.1  P. glomerata    云南地皮消
+Bracts shorter than rachis internodes, distant, usually heteromorphic; spikes not cylindric; flowers distant on rachis(2)
   
2(1)Spikes usually with 1 or 2(or 3) nodes.5  P. delavayana    地皮消
+Spikes with 4 to many nodes(3)
   
3(2)Rachis usually zigzag, winged below nodes.2  P. alata    节翅地皮消
+Rachis straight, wingless(4)
   
4(3)Bracts oblong, elliptic, or ovate, usually subtending many flowers.3  P. cavaleriei    罗甸地皮消
+Bracts cordate to suborbicular, usually subtending only 1 flower.4  P. hainanensis    海南地皮消
   
   Lower Taxon
  • Pararuellia delavayana  (Baillon) E. Hossain  地皮消
  • Pararuellia hainanensis  C. Y. Wu & H. S. Lo  海南地皮消
  • Pararuellia alata  H. P. Tsui  节翅地皮消
  • Pararuellia cavaleriei  (H. Léveillé) E. Hossain  罗甸地皮消
  • Pararuellia glomerata  Y. M. Shui & W. H. Chen  云南地皮消