Table 1 in Calycosiphonia or Kupeantha (Coffeeae, Rubiaceae)? A morphological and molecular study of a new species from the Albertine Rift

Table 1 (continued on next page). Morphological comparison of the taxa in the AC clade. Core Argocoffeopsis = A. subcordata (Hiern) Lebrun, A. scandens (K.Schum.) Lebrun, A. kivuensis Robbr., and related species. Argocoffeopsis eketensis (Wernham) Robbr. and A. rupestris (Hiern) Robbr. (formerly considered to belong to the genus Argocoffea (Pierre ex De Wild.) Lebrun) are kept separate. Core Kupeantha = Kupeantha Cheek with the exclusion of K. pentamera (Sonké & Robbr.) Cheek because its inclusion in Kupeantha was based on morphology only (Cheek et al. 2018). Character states in bold are characteristic for Calycosiphonia albertina Ntore & Robbr. sp. nov., when compared to other species of Calycosiphonia and Kupeantha.
Core ArgocoffeopsisArgocoffeopsis rupestris and A. eketensisKupeantha pentameraCore KupeanthaCalycosiphonia albertina sp. nov.Calycosiphonia spathicalyx and C. macrochlamys1Habitlianasscandent shrubsshrubsshrubsshrubsshrubs2Foliageevergreendeciduousevergreenevergreenevergreenevergreen3Lateral budsaxillaryaxillarysupra-axillarysupra-axillaryaxillaryaxillary4Stems and leavesmostly hairyhairyglabrousglabrousglabrousglabrous5Suberisation barklatelatelatelatelateearly, sometimes late6Colour old rhytidomebrownishbrownish or greyishgreyish to brownishwhitishreddish brownbrownish (C. s.); greyish (C. m.)7Herbarium material, colour in dried stategreenish or brownishbrownishblackishblackishblackishblackish8Heterophylly – blades on orthotropous branches reducedyes? (field study of these deciduous taxa needed)nonoyesyes (C. s.);? (C. m.)9Anisophyllynonononoyesoccasionally10Differentiation in macro- and microphyllous nodesvery occasionalnononoyes, pronouncedoccasionally, not pronounced11Leaf blade tipacuminateacuminateacuminateacuminate or spathulateacuminateacuminate or spathulate12Domatiatuft, pocket, pit, or crypt typepocketabsentabsenttuft typecrypt type (C. s.); absent (C. m.)13Bracts & bracteolespre-calyculipre-calyculi or scale-like calyculicalyculi, very rarely upper calyculus with foliaceous appendagescalyculi without foliaceous appendagescalyculi, upper one with foliaceous appendagescalyculi, at least upper one with foliaceous appendages14Flowers(4–)5–8-merous6–8-merous5-merous(4–)5-merous5–6-merous7–8-merous15Calyxshort tube, often with irregular marginshort tube with short teeth or vague lobesshort tube with short teeth or vague lobesshort rim surpassed by nectary discshort tube, truncatelong tube splitting at anthesis (C. s.); truncate short tube (C. m.)16Corolla tube/lobes ratio1–1.53.5–4.51.2–1.5; lobe much shorter than tube0.5–0.70.7–0.8; ± rotate with tube much shorter than lobes1–1.517Style/stigmatic arms ratio3–56–83.21.2–61; massive stigmatic arms on thin and short style4–518Ovules per placenta111111–219Anther thecaewithout transverse septawithout transverse septawithout transverse septawithout transverse septawithout transverse septamultilocellate20Anther tipapiculate ormucronatebluntapiculateapiculatebluntapiculate21Anther connectivenot widenednot widenednot widenednot widenednot widenedwidened22Fruit shapespherical, ± didymous; foliaceous lobes of pre-calyculi accrescentspherical, somewhat flattened; foliaceous lobes of pre-calyculi accrescentsubsphericalellipsoidellipsoidspherical23Fruit colourredredorangeorangeredorange (C. s.); unknown (C. m.)24Placental outgrowth around seedsnot presentnot presentseeds partially surroundednot presentnot presentseeds entirely surrounded25Pollen(3–)4–5-colporate; exine rugulate(3–)4–5-colporate; exine rugulate3-colporate; exine rugulate3-colporate; exine rugulate3-colporate; exine rugulate3-colporate; exine rugulate26BiogeographyGuineo-CongolianGuineo-Congolian & ZambezianLower GuineanLower Guinean or Afromontane (W Afr.)Afromontane (Kivu-Ruwenzori)Guineo-Congolian and Indian Ocean coastal belt