FcdMands, etc. | FLORA ANTARCTICA. 297 



ill letter a by the fibrous tissue of the liber; the letter c points to the scalariform tissue, deposited in trian- 

 gular wedges of a pale colour and the dark triangular mark beyond it is the alburnum : the letter b indicates the 

 axis of the stem, here formed of woody fibres, with no medulla or scalariform tissue intermixed ; fig, 9, a vertical 

 section of the same, the letters corresponding ; fig. 10, more highly magnified view of a portion of the axis (b), the 

 scalariform tissue (c), and the cellular tissue of the liber; all the above, except y?y. 7, are very highly magnified. 



Plate CVII. Us, Fig. 1, mode of branching of M, punctulatvm, of the natural size; a, newly formed ramuli, 

 b, flowering amenta about to fall away ; c, apex of the stem ; fig. 2, portion of the stem showing the position of the 

 stomata ; fig. 3, stoma ; fig. 4, the same viewed from the cavity it corresponds to ; fig. 5, transverse section of cavity 

 and stoma, the portion above the diaphragm filled with an opaque substance ; fig. 6, another stoma with its aperture 

 unobstructed ; all highly magnified. 



Plate CVII. ter, Fig. 8, section of a branch in the first year of its growth, shewing (4) the vessels of the 

 liber ; c, the alburnum ; d, the pleurenchyma deposited in the axis :fig. 9, portion of a section of the stem from a branch 

 three years old ; a, the cuticle ; 6, the epiphlceum ; c, mesophloeum ; d. vessels of the liber ; e, alburnum ; f, layers 

 of wood; g, rays of pleurenchyma ; k, pleurenchyma deposited in the axis of the plant ; fig. 10, pleurenchyma 

 spirally marked and scalariform vessels from the same; fig. 11, longitudinal section of tubes of pleurenchyma from 

 the axis; fig. 12, portion of very old wood: — all very higldy magnified. 



Subgen. II. Eumyzodenclron ; rami foliosi; bractese nullse; flores racemosi v. secus ramos solitarii 

 bird quatemive, stamina 3. 



2. Myzodendkon brachi/stachi/um, DC. ; ramis teretibus leevibus, ramulis griseo-puberulis, foliis 

 anguste oblongis lineari-oblongisve subenervibus, fioribus in racemos axillares basi folio suffultis clispositis 

 masculis triandris setis plumosis pericarpio 6-tuplo longioribus. M. brachystachyurn, DC. Coll. Mem. VI. 

 1. 12. f. 1. Prodr. vol. iv. p. 286. M. planifolium, Banks el Sol. MSS. in Bill. Banks, cum icone. 



Hab. South Chili and Tierra del Fuego ; Banks and Solander and all succeeding voyagers. 



Siijfrutex ramosus, bipedalis, ramulis junioribus tantum foliosis. Cauli-s brevis, basi dilatatus, alterne patentim 

 ramosus. Rami divaricati, teretes, articulati, ad nodos vaginati et paulo constricti, internodiis uncialibus crassitie 

 pennae olorina? ; cortice lsevi, fusco-brunneo, griseo-punctulato, punctis rimosis, hie illic e lapsu ramulorum florentium 

 cicatricato ; vaginis bilabiatis. Folia caulina in ramulis propriis demum elongatis disposita, subfasciculata, plana, 

 obtusa v. subacuta, nervis 3-5 valde obscuris percursa, huide viridia, utrinque stomatibus plurimis iustructa. 

 Inflorescentia ramulis foliosis post anthesin deciduis disposita, racemosa. Racemi basi folio obovato obtuso apice 

 piloso suffulti, breves, densiflori ; fioribus breviter pedicellatis. Flores Masc. Stamina 3, erecto-patentia, ad 

 apicem pedicelli circa glandulam depressam disposita ; filamento crasso, tereti, curvato, cum anthera parva M. punc- 

 tulato simillima contiuuo. Flores Fcsm. Ovarium ut in praecedente sed disco epigyno manifesto, stylo paido 

 longiore pedicelloque brevi pubescente instructum. Fructus ovatus, disco apice concavo terminatus, trigonus, 

 obscure sulcatus, setis plumosis fructu sextuplo longioribus, pilis apice attenuatis. Columna seminifera latiuscula, 

 plana, compressa, parieti loculi appressa. Semen loculum \ implens, pendulum, globoso-ovoideum, 3-4-suleatum. 

 Albumen carnosum ; embryo parte superiore albuminis semi-immersus, membrana tenui cum funicido continuo 

 inclusus ; extremitate radiculari ultra albumen exserta, dilatata, concava ; cotyledonari tereti, apice oblique truncata, 

 obscure emarginata, intus cava. 



The important and conspicuous characters that separate this and the following from the M. punctulatum, and 

 which have induced me to subdivide the genus, are, the absence of tubercles on the stem and branches, the ramuli 

 being foliaceous and not bracteate or scaly, the triandrous male flowers, the larger column in the ovarium, the 

 deeply sulcate albumen, and especially the structure of the stem, which differs so remarkably in the two subgenera, 

 that no one, from an examination of their wood alone, would hesitate in pronouncing them to be plants widely 

 separated in a Natural System. 



3 s 



