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Some indication of the variation outside the present area is given in the generic descriptions. Specialised terminology-The relating to the androecium and gynoecium follows Green (l979iand Creen(1q80). termforal rubeis prelerred rotaly\-tubc. used by Bentharn it8tli fot lhe rea\on\stated by Parlin (1955)and Douglas{1957) The r5eof ttomium for a resion of dehiscencein ihe anther is explained by Esau (1965) and illustrated by Fahn (1974). The rnorphology of the gland on the connective requires some explanation, as it does not appear to have been previously used as a diagnostic character in this group: it may vary'from a near-globular, | featureless structrue, as in M. helmsii (Fig. l12) throueh a serieshaving an increasingly prominent neck, with an apparently porate, terminal orificel In T. patviflira (Fig. 17)and T. nuviculqta (Fig. 30) the gland usually-protrudes onlv shortlv between the microsporangia and is termed trunc(tte or compressed-urceolate; wh6n it js i contracted below the apex, as in T. v,ittv'eri (Fig. 37) and T. hexantlra (Fig. 63). it is termed urceolqte, while at the extreme, when the neck is long and curved, as in T. elliotrii tFie. 54), it is termed urceolate-falcata. The shape of the gland may also be clavqte, as \n-Tl. mqisonneuvcitFigs. 6-7) ot conpound, with smaller lateral bulges, as in M..finbrisepala (Fig. 100). The flower stalk is here interpreted as a peduncle as it appears homologous with the structure bearing two or three flowers with pedicels in related genera Onlv for unusually variable parameters are dimensions qualified as approximate. Characters omitted from sone descriptions can be assumed to be unknown. Key to the genera,basetl on inland Australian species -i- 1. Stamens less than 10, usually opposite the sepals; ovules 2 or 2 2 super- gland prominent, often equalling 'orDosed. ascending or lateral; anther connective exceedins thi anther, clavate or + urceolate . Thryptomene Endl. (p.184) 1*. Stamens10, or 5 oppositethe petals;ovules 2 or 6 10,collateral, apical; anther connectivegland lessthan half as large as the anther,t'iltl:"O,ill,1i", ;"rth. (p. 195) THRYPTOMENE Endl. Glabrousslrubs, slenderor spreading,mostly 0 5 2 m high (one speciesoutside the areaarborescent); bark usuallysmooth, dark greyIo bro\.\n. occasionally6brou'. Lenves small. entire. opposite,mostly + flat above and convex below, with severalto many i.-.is.a ghnds'especiallyvisible on the lower surface. F/ouers sessile,subterded by a pair of iomplicatL braCteoles,at least in the bud stage,inflorescence mostly solitary wiih a very short to long peduncle,borre singlyin the-upper leaf axils;some specie-s with inflordscencespairedll|the axrls. Floral tubemostly less than 3 mm long, cylindrical, tulbinate. hemisphirjcator rarely laterally flattened,smooth, ribbed or rugose,adnate to the ovary, sornetimesproduced beyond it making-the. disc- surrounding the style + concave. Sezdlsand petils 5 or rarely 6, borne on the rim of the tube; sepalsas long ur ifr" tot " tb very shbrt, scarious.petaloid or petaloidwith scariousmargins, entire or denticulate;petaliaboul as longas the tubeor shorter.rnostly rounded. entire. moslly (antesepalous)or 10 (in a single 'whorl,pink, white or the two suffused. ,Slarrersusually either 5 not aluays regularlyopposite the perianth parts).1rarely 6 (antesepalous,f. /rex- an,Jra),ya.iable between 6 and 9, or between15 and 30 (in one speciesoutside the area); filurodotfilifotm, .rsuallyat leasttwice as long asthe anthel at maturity; connectivebearing a Drominentgland which may be globular, truncate,urceolate or falcatewith a porate orifice. and sometimesprotruding betweenthe two microsporangia;anther tetraspor- 'squ .puq3cs '8uol lnoq€ s/rdas trnoqlr,r lo eso8ru-l?FpuelS dlolnuru 'eJ?urqJn]JEurpnlfuol ,snor.rBcs ruur 9. 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