I 



J^Jiebalium.'] * xxviii. UUTACE.E. 337' 



base or nearly so, usually produced into a short or long appendage above the 

 cells; styles inserted below the middle and immediately united into one; 

 stigma small ; ovules 2 in each cell, supei-poscd. Cocci 2-valved, usually 

 more or less beaked at the top or the ouler angle ; the endocarp cartilaginous 

 and separating elastically. Seeds usually solitary, — Shrubs either glabrous 

 or slightly stellate-pubescent or clothed with scurfy scales, very rarely hir- 

 sute. Leaves alternate, simple, entire or slightly toothed, the glands often 

 large and prominent, ■ Inflorescence axillary or temiinal, peduncles rarely 1- 

 flo'wered, usually forming an umbel-like short raceme, rarely reduced to a 

 compact head. Flowers small, white or yellow, very rarely and exceptionally 

 4-merous or 6-merous. 



Besides the Australian species, which are all endemic, the genus comprises one from New 

 Zealand, nearly allied to, but apparently distinct from one of the Australian ones. F. Mueller 

 unites the genus with Eriosieumn, ^bnt'the aestivation of the corolla, besides the habit and a 

 number of smaller characters, appear to me sufficient to warrant the maintaining it as dis- 

 tinct. Practically, the section Leionewa may be at once distinguished from Eriosiemon by 

 the strictly valvate corolla, and Thehalium proper by the scurfy scales always present at 

 least on the flower and ovary. 



Sect. 1. Zieiouema, F. Muelh — Glabrous or pulescent plants wiihout scurf y scales. 

 Petals strictly valvate, glabrous. ' . 



Flowers axillary. ,,.... 



Peduncles short, 1 -flowered. Stamens not exscrtcd. 



licaves flat, linear or linear-lanceolate, rigid, pungent , . • 1. P. pmjgens. 



Leaves linear-terete, obtuse, chauncllcd above 2. P. montanum, 



T'Caves linear, obtuse, the margins revolute . / . • . . 3, P. lachnoides, 

 Peduticlcs several-tlowcred. Stamens slightly exserted. 



Leaves linear, with revolute margins, crowded, not exceeding 



4 in. Peduncles short, few-tlowcred. Ovary tomentose . 4. P, phj/UcifoUum. 

 Leaves linear, 1 to 3 in. Peduncles several-flowered. Ovary 



glabrous ,,...** 5. P. dentation, 



i'lowers terminal. Stamens usually exserted. 

 leaves flat or nearly so. llowers umbellate. 

 Leaves truncate, notched or 2-lobcd at the top. 



Umbels pedunculate and reflcxcd. Petals erect .... 6. P. Rahtoni, 



Umbels erect, nearly sessile ^ .... 7- P. hdobiun. 



Leaves acute or obtuse. 



Leaves oblong or lanceolate. 



Leaves acute, underpin, long %. P, lawprophyllnm. 



Leaves obtuse, J to f in., thinly coriaceous . . . • 9. P. elatuts. 

 Leaves crowded, under \ in., coriaceous, very obtuse, the 



margins recurved 10. P. Oldfieldiu 



Leaves small, obovate or orbicular. 



Leaves rigid but not thick, flat or concave . . . . . 11. P. roinndifohum. 



Leaves very small, (hick, convex 12. P. Iracliyphyllum, 



Leaves linear, with closely revolute margins. Flowxrs capitate . 13. P. dtosmeum. 



Sect. 2. Enpheballum.— 77/<- whole ylant or at least the inflorescence and eah/r, 

 ^^ often the petals and ovary, more or less covered with scurfy peltate scales, often 

 fringed at the edge, those of the ovary often closely imbricate in one mass. letals 

 ^tcrally imbricate or rarehj almost whale in the bud, with infiexed valvate tips. 



Umbels terminal. Leaves small or rarely exceeding 1 in.^ 

 Calyx truncate or very shortly toothed. (Eastern species.) 

 Leaves obovate with recurved margins, coriaceous, shining 



above, scalv underneath ^*^- ^' ozothamnoides. 



VOL. I. ■ Z 



