Jatropha macrantha, MULL. ARG.

Romero, Giovanna E., 2022, Stem and caudex anatomy of succulent plant species, Adansonia (3) 44 (10), pp. 81-90 : 85

JATROPHA MACRANTHA MÜLL. ARG.

Stem cortex cells have druses, tannins and in lesser number mucilage cells. Wood is diffused fibrous. Axial matrix is formed by libriform fibers, gelatinous fibers, septate fibers, scanty vasicentric and apotracheal parenchyma, also vessels with scalariform and circular bordered pitting. ( Fig. 2G, H ). Ray system is uniseriate. Ray parenchyma cells become lignified when meet the vessels and sometimes when ray cells are not close to vessels. There is little functional phloem and much of collapsed phloem has parenchyma cells and scattered mucilage cells. Collapsed phloem is distorted due to the dilatation of the axial secondary phloem ray parenchyma. Pith was not fixed.

Figures

FIG. 2. — Transverse sections of stems and caudices, unless otherwise noted: A, B, Momordica rostrata Zimm; A, caudex, septate fibers, tangential section; B, caudex, vessels with bordered pits; C-F, Jatropha curcas L.; C, caudex, solitary vessels, wood; D, caudex, fibrous wood; E, caudex, vessels, radial section; F, caudex,thin-walled libriform fibers,parenchyma with amyloplasts,radial section;G, H, Jatropha macrantha Müll.Arg.; G, stem,diffuse fibrous wood,thin-walled libriform fibers, septate and gelatinous fibers; H, stem, axial and ray parenchyma. Abbreviations: ur, uniseriate ray; br, biseriate ray; p, parenchyma; f, fibers; sp, secondary phloem; ct, conjunctive tissue; sf, septate fibers; v, vessel; lf, libriform fibers. Scale bars: A, C-H, 50 µm; B, 10 µm.