Ixora sp.

Classification

Regnum: Plantae

Divisio: Magnoliophyta

Classis: Magnoliopsida 

Ordo: Rubiales

Familia: Rubiaceae

Genus: Ixora

Spesies: Ixora sp.

Local name: Bunga soka

Habit: Subshrub

Characteristic: Many color of flowers

Distribution: Tropical Asia

Benefit: Ornamental plant

Location: UPI library

Conservation status: Threatened species 

Description

Ixora is one of the most easily recognizable genera in Rubiaceae, in part due to the often striking inflorescences and tetramerous flowers (Fig. 1). Diagnostic features for the genus (adapted from De Block, 2007) include articulated petioles, narrowly tubular tetramerous flowers, bilobed stigmas, bilocular ovaries and fruits (or, rarely, with more than two locules), uniovulate locules and seeds with a large adaxial hilar cavity. In contrast, identification at the species level is difficult, with species distinguished on the basis of minor and often continuous characters, typically involving features of the inflorescence and flowers (De Block, 1998, 2003). This is particularly the case for the African representatives of the genus, which De Block (1998) described as ‘extremely homogeneous’ in their characters. On Madagascar, there are several morphological traits occurring in Ixora that are absent in the continental African taxa and rare in the genus as a whole. These include: (1) reduction of the number of flowers per inflorescence towards solitary flowers; (2) increase from two- to four-locular ovaries; and (3) increase towards large flowers (corolla tubes >15 cm long) and fruits (De Block, 2007, 2008, 2013).

Source: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3838549/