A. _Lycopodium dichotomum._ Transverse section of stem: _lc_, leaf-cushion; _lt_, leaf-trace; R, roots. B. _L. cernuum_, portion of cortex of fig. H, enlarged. C. _L. saururus._ Cortex: _lt_, leaf-trace; _a_, thin-walled tissue; _b_, thick-walled tissue; _lc_, lacuna. D. _L. saururus._ Stele: _x_, xylem; _p_, phloem. E. Portion of fig. D, enlarged: _px_, protoxylem; _p_, phloem. F. Transverse section of leaf of _Lycopodium_. G. Vascular bundle of leaf: _px_, protoxylem. H. _L. cernuum_: _b_, branch of stele; _c_–_c″_, cortex; _s_, space in cortex; _lt_, leaf-trace. I. Stele of fig. H, enlarged (phloem omitted).] In erect stems of _Lycopodium_, as represented by _L. cernuum_ (figs. 123, 125, H, I), _L. Dalhousianum_, _L. squarrosum_ (fig. 122) and many others, the stele presents a characteristic appearance due to the xylem plates being broken up into detached groups or short uniseriate bands with the interspaces occupied by phloem islands. This type of structure bears a superficial resemblance to that in the single stele of certain species of the fern _Lygodium_[97], but it is distinguished by the islands of phloem scattered through the stele. In other species the xylem tends to assume the form of a Maltese cross (_e.g._ _L. serratum_ Thbg.) or it may be disposed as =V=-shaped and sinuous bands terminating in broad truncate ends composed of protoxylem elements. This form of the xylem and the distribution of the phloem groups are shown in fig. 125, D, E, drawn from a section of a plant of _Lycopodium saururus_ Lam.[98] collected by Mr A. W. Hill at an altitude of 15,000 feet on the Andes of Peru. The position of the protoxylem is shown fig. 125, E, _px_.