yellow flower-heads; P. biloba, whose branches are sometimes covered for six inches together with feathery flowers; and P. heterophylla,167 a very graceful plant. Another species, P. brevifolia,168 has flowers which, when infused in hot water, give out so brilliant a yellow colour that it is worth examination of a probable source of a dyeing material.
The Persoonias are plants of little beauty; P. Frazeri is the handsomest; P. macrostachya,172 like Petrophila brevifolia, seems to possess dyeing properties that deserve investigation.
Of Hakea the species are numerous, and generally by no means worth cultivation, H. ruscifolia being the only one
(167) Petrophila heterophylla; ramis glabris, foliis elongato-linearibus obtusis apiculatis basi longè angustatis utrinque striatis simplicibus v. 2-3-partitis, strobilis ovalibus axillaribus sessilibus: squamis ovatis obtusis nitidis glabris, calycibus sericeo-tomentosis, stigmatis glabri articulo inferiore angulato superiore subulato multò majore.
(168) Petrophila brevifolia; ramulis glabris, foliis uncialibus teretibus exsulcis apice spinosis, strobilo terminali ovato sessili squamis glabris: exterioribus linearibus acuminatis interioribus obatis acutis, calycibus tomentosis, stigmatis articulo superiore barbato inferiori glabro angulato æquali.
(169) Petrophila juncifolia; ramulis glabris, foliis teretibus longissimis exsulcis apiculatis, strobilis terminalibus ovatis subsessilibus squamis glabris: exterioribus linearibus acuminatis interioribus ovatis acutis, calycibus tomentosis, stigmatis articulo superiore barbato inferiore glabro angulato multò longiore.
(170) Petrophila glanduligera; partibus omnibus junioribus villosis sericeis, foliis sessilibus semiteretibus bipinnatis laciniis pungentibus exsulcis lateralibus minimis 3-4-partitis superiorum lobis 3-partitis, stobilis subglobosis pedunculatis foliis longioribus: squamis basi tomentosis sursùm glabris, calycibus hirsutis sepalis apice glandulam subulatam nudam gerentibus, stigmate fusiformi inarticulato pubescente.
(171) Petrophila intricata; ramulis sericeo-villosis, foliis teretibus levitèr sulcatis bipinnatis petiolo flexuoso laciniis trifidis simplicibusque pingentibus, strobilis terminalibus et axillaribus subglobosis: squamis sericeis cavescentibus,—P. serruriæ affinis.
(172) Persoonia (Sacculigera) macrostachya; ramis pube brevi tomentosis, foliis filiformibus subtus sulcatis floralibus brevissimis, floribus solitariis axillaribus pedunculis tomentosis, calycibus pilosis hinc saccatis, antheris obtusis, ovario glabro stylo nullo.
(173) Persoonia Drummondi; ramulis pubescentibus, foliis falcatis lineari-lanceolatis elongatis aversis basi angustatis glandulosis, floribus solitariis, pedunculis calycibusque tomentosis, antheris linearibus obtusis, ovarii stipite articulate.—P. falcatæ affinis.
(174) Persoonia Laureola; undique glaberrima, foliis latè ovalibus basi angustatis obtusis venosis, calycibus apice muticis minutissimè pubescentibus, ovarii stipite inarticulato, stigmate dilatato.
