Friday, August 26, 2016

[Botany • 2014] Argostemma glabra • A New Species (Rubiaceae) from Vietnam

Argostemma glabra 
  Joongku Lee, T.B. Tran & R.K. Choudhary

Argostemma glabra Joongku Lee, T.B. Tran & R.K. Choudhary, a new species of Rubiaceae from Khanh Hoa Province of Vietnam is described and illustrated. It is morphologically similar to A. apiculatum, but differs in its creeping habit, 4–6 flowered inflorescence, bigger and triangular bracts, smaller peduncle, bigger and broadly triangular calyx lobes, and non-apiculate and smaller corolla. Color photographs, a line drawing and a taxonomic key are provided to facilitate identification.

 Fig. 1. Argostemma glabra. — A : Habit. — B : Glabrous stem. — C : Ven- tral view of plant showing inflorescence. – D : Dorsal view of plant showing pale green leaves — E and F : Adaxial and abaxial view of leaf. — G : Stem show- ing an anisophyllous leaf pair (reduced leaf and pet- iole of normal leaf). — H : Flower showing glabrous calyx. — I : Opened flower showing anther cone. — J : Non-apiculate corolla lobe.

Ritesh Kumar Choudhary, Tran The Bach, Do Van Hai, Bui Hong Quang, Sang-Hong Park, Changyoung Lee and Joongku Lee. 2014. Argostemma glabra (Rubiaceae), A New Species from Vietnam. Annales Botanici Fennici. 50(4); 258-262. DOI: 10.5735/086.050.0408

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