Key to the Supergroups of Bornean Homalomena


Based on Wong, Hoe, Soon & Boyce ( Aroideana V36, 2012 )

Click on 📌 to highlight and compare characteristics.
Click on the line numbers to select characteristics.



1A. SpatheSpathe: A large sheathing bract enclosing the flower cluster. divided by a moderate to pronounced constriction into a welldefined upper limb and a convoluteConvolute: The process of convolute vernation involves the wrapping of one margin of the leaf's blade over the other. This folding mechanism makes the emerging leaf look like a tube. lower portion; inflorescences during anthesisAnthesis: The period during which pollen is presented and/or the stigma is receptive. with complex spatheSpathe: A large sheathing bract enclosing the flower cluster. and spadixSpadix: A spike of minute flowers closely arranged around a fleshy axis and typically enclosed in a spathe. movements and often spadixSpadix: A spike of minute flowers closely arranged around a fleshy axis and typically enclosed in a spathe. elongation .. 2
2A. Leaf blades narrowly lanceolateLanceolate: , bases cuneateCuneate: ; interpistilPistil: The female reproductive part of a flower. lar staminodeStaminode: A sterile or abortive stamen, frequently resembling a stamen without its anther. s absent .. 📌Geniculata Supergroup
2B. Leaf blades mostly sagittateSagittate: or cordateCordate: , never narrowly lanceolateLanceolate: ; interpistilPistil: The female reproductive part of a flower. lar staminodeStaminode: A sterile or abortive stamen, frequently resembling a stamen without its anther. s present, only very rarely absent .. 📌Cyrtocladon Supergroup
1B. SpatheSpathe: A large sheathing bract enclosing the flower cluster. not divided into a lower and upper portion by a constriction; inflorescence movement during anthesisAnthesis: The period during which pollen is presented and/or the stigma is receptive. comprising simple gaping and closing of the spatheSpathe: A large sheathing bract enclosing the flower cluster. limb, with virtually no spadixSpadix: A spike of minute flowers closely arranged around a fleshy axis and typically enclosed in a spathe. movement .. 3
3A. SpatheSpathe: A large sheathing bract enclosing the flower cluster. at most 1.5 cm long, usually much less; staminate flowers each comprising 2(-3) stamenStamen: The pollen-producing reproductive organ of a flower. s without an expanded flat connective; interpistilPistil: The female reproductive part of a flower. lar staminodeStaminode: A sterile or abortive stamen, frequently resembling a stamen without its anther. s much shorter than pistilPistil: The female reproductive part of a flower. s; mostly small plants and often rheophyticRheophytic: An aquatic plant that lives in fast moving water currents. .. 📌Chamaecladon Supergroup
3B. SpatheSpathe: A large sheathing bract enclosing the flower cluster. more than 2 cm long and usually much longer; staminate flowers each comprising 4 stamenStamen: The pollen-producing reproductive organ of a flower. s, almost always with a flat, expanded connective; interpistilPistil: The female reproductive part of a flower. lar staminodeStaminode: A sterile or abortive stamen, frequently resembling a stamen without its anther. s equalling or longer than pistilPistil: The female reproductive part of a flower. s; mostly medium to large plants, never rheophyticRheophytic: An aquatic plant that lives in fast moving water currents. .. 📌Homalomena Supergroup
 


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