FIGURE 4 in Foliar architecture of some members of the tribe Senecioneae (Asteraceae) with a key for identification of the Mexican genera

FIGURE 4. Quaternary veins pattern in Senecioneae. A–Q. Random reticulate. A, Barkleyanthus salicifolius, conspicuous secretory canals (arrow); B, Digitacalia jatrophoides; C, Erechtites valerianifolia, conspicuous secretory canals (arrow); D, Nelsonianthus tapianus; E, Packera coahuilensis; F, Packera sanguisorbae; G, Pentacalia guerrerensis; H, Pippenalia delphinifolia; I, Pittocaulon praecox; J, Psacaliopsis paneroi; K, Psacalium peltigerum; L, Pseudogynoxys haenkei; M, Robinsonecio gerberifolius; N, Roldana michoacana; O, Senecio mulgediifolius; P, Telanthophora grandifolia; Q, Telanthophora liebmanii. R. Regular polygonal reticulate, Villasenoria orcuttii. Bar is 500 μm in A–C, E, G–O, R; 1mm in D, F, P, Q.