Falklands, etc.] 



FLORA ANTARCTICA. 



301 



of fibrous tissue (b) similar to that of the liber ; at a other woody fibres are seen descending in the bark : — the 

 more usual disposition of the tissues in the stem of this plant is shewn at Plate CVII. ter, f. 1 ,—fig. 6, a vertical 

 section of the same through the axis of the stem, showing, at a, a bundle of woody fibres in the bark protected by 

 very thick cells ; at b, the vessels of the liber in immediate contact with the wood ; at c, the scalariform tissue 

 forming the wood : — all more or less highly magnified. 



Plate CVII. bis, Fig. 7, stem aud branches of M. bracliystachyum ; letter a, flowering branches which fall away ; 

 b, leaf-bearing branch elongating ; c, apex of the stem which suffers no further elongation ; figs. 8 and 9, vertical 

 sections of stem and branches : letter A, internode of the third year ; B, internode of the second year ; a, apex of 

 the stem ; b, nascent buds ; c, branches ; d, vascular bundles of the stem ; e, vascular bundles of the branches ; /, scar 

 left by the fall of the leaf of the previous year ; g, lips of the vaginae : — of the natural size : fig. 10, transverse section 

 of leaf-bearing branch, showing the solitary series of vascular bundles ; fig. 11, the same, more liighly magnified 

 letter a, the cells originating the cuticle ; b, vessels of liber ; c, wood ; d, pleurenchyma similar to that of the liber 

 fig. 12, transverse section of stem, two years old; letter b, the outer series of wedges of wood; c, inner ditto 

 d, wedges belonging to a third series, placed in the medulla ; x, canty containing a bud : — more or less magnified. 



Plate CVII. ter, Fig. 1, portion of a transverse section of the stem of M. brachystaeliyum, five years old ; letter a, 

 woody cells in the bark ; b, vessels of the liber ; e, alburnum ; d, scalariform tissue of the wood ; e, slender spiral 

 and other vessels between each layer of wood ; /, pleurenchyma similar to that of the liber, deposited with the second 

 and third layers of wood ; g, pleurenchyina deposited during the first year at the same time as the first vessels of 

 the liber ; //, cellular tissue between the concentric series of wedges ; the letters c', d &c, refer to the same tissues 

 in the wedge of the inner series, and letter m indicates the pith ; fig. 2, a vertical slice from the same branch, 

 including the same tissues viewed longitudinally; the letters indicate the same tissues as mfig. 1. 



In the following figures the letters indicate the same tissues ; Fig. 3, M. linearifolium, DC, a portion of a 

 transverse, and. fig. 4, a corresponding longitudinal slice of a stem four years old; fig. 5, a, constricted scalariform 

 tissue of wood ; b, spirally marked vessel from between the layers of wood ; fig. 6, M. auadrifiorum, DC, portion of a 

 transverse, xa&fig. 7, portion of a longitudinal slice, from a stem four years old. 



3. Myzodendeon ollongifolium , DC; foliis oblongo- v. lineari-lanceolatis, fioribus in racemos axilJares 

 basi folio suffultos dispositis, setis phimosis pericarpio multoties longioribus. M. oblongifoliuui, DC. Prodr. 

 vol. v. p. 671. Ptvpp. et Endlicher, Nov. Gen. et Sp. Am. p. 1. t. 2. Delessert, Icon. Select, vol. iii. p. 47. t. 80. 



Hab. South Chili and Fuegia ; Port Famine, Capf. King. 



Omnia M. bracl/ystacliyi sed folia elongata et angustiora, setseque pericarpii ter longiores. 



Mr. Darwin's specimens of this have male flowers only, those collected by Mi-. Eights and Webster have ripe 

 fruit ; all agree with the excellent figure given by M. Decaisne in Delessert's Icones, in which the position of the 

 seed in the achaenium alone is inaccurate. 



4. Myzodendron qiiadrifiorum, DC; ramis florentibus elongatis ramulos alternos 3-5-floros apice 

 unifoliatos gerentibus, foliis parvis late oblongis obtusis, achseniis linearibus, pericarpii setis gracillimis 

 apicibus denudatis. (Tab. CVII. ter, Fig. 6 and 7.) M. cjiiadriflorum, DC. Coll. Mem. 1. 12. f. 1. Prodr. 

 vol. iv. p. 2S6. 



Hab. Strait of Magalhaens, Port Famine, Capt. King ; Staten Land, Mr. Webster. 



The flowering ramuli of this species are much elongated, the leaves small, and the filaments of the pericarp 

 very slender, with brown naked apices. A description of the wood is given at p. 300. 



Plate CVII. ter, Fig. 6 and 7, wood of M. auadrifiorum ; letter b, vessels of the liber ; c, alburnum ; d, scala- 



3 u 



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