394 



NATURAL HISTORY OF PLANTS. 



Fig. 424. 

 Flower (^). 



V 



Fig. 425. 



Long. sect, of flower. 



or denticulate, quite covered with glandular odorous aromatic points. 

 The rachis and folioles are generally articulate. The flowers are 

 axillary or terminal, sometimes solitary, sometimes in more or less 

 ramified biparous cymes. 



Boronella, consisting of plants growing in New Caledonia, is dis- 

 tinguished from Boronia by its decussate unequal sepals, its uni- 

 ovulate ovaries, and almost erect orthotropous ovules. 



Zieria (figs. 424, 425), composed of Australian shrubs, is also 



nearly allied to Boronia, to 

 zieria smitui. which it has been even 



proposed that it should be 

 united, the only difference 

 being in its four alternipe- 

 talous stamens, lined within 

 their base by a larger or 

 smaller gland. Zieridium, 

 with its uniovulate ovaries and suborthotropous ovules, is to Zieria 

 what Boronella is to Boronia. Acradenia consists of species of Bo- 

 ronia, with 4-8-merous flowers, imbricated petals, and ovaries con- 

 taining two collateral ovules capped by an obturator. In a secondary 

 group of Eriostemonece, the leaves are alternate and simple. 



The genus Eriostemon (figs. 426-428) itself has 4-5-merous 



flowers, an imbricated, rarely subvalvate co- 

 rolla, and a diplostemous androceum, the eight 

 or ten stamens having anthers more or less 

 long-apiculate. Microcybe only differs from 

 it by an often incomplete calyx, represented by 

 leaves varying in number from one to five. 

 The corolla is pentamerous and imbricated; 

 the androceum formed of ten stamens longer 

 than the petals, and the gynseceum composed 

 of only two carpels. It has flowers grouped in 

 capitules. In Geleznovia also with alternate leaves, 4-5-merous, 

 flowers may be observed constructed like those of Boronia ; but the 



'Eriostemon {Crowed) 

 salignum. 



Fig. 426. 

 Flower. 



Reg. (1841), sub n. 47.— A. Cunn., in. Field 

 N. S.- Wal., 330. — Andr., Bot. Repos., t. 606. 

 — Hook., Icon., t. 722. — Endl., Nov. Stirp. 

 Dec, 6; in Ilaeg. Fnum., 16. — Nees, in PI. 

 Preiss., ii. 227. — Baetl. in PL Preiss., i. 

 166. — TUBCZ., in Bull, r Mosc. (1852), ii. 

 160. — P. Muell., in Rook. Kern Jouni., 



viii. 38; Fl. Vict., i. 109; Fragm., i. 3, 66, 

 98; ii. 97, 177, 179, 180; iv. 28, 135, 172.— 

 Benth., Ft. Austral., i. 307. — A. Gray, Unit. 

 St. Fxpl. Fxp., Bot., i. 330.— Bot. Mag., 1. 1763, 

 4052. — WAIiP.,2Zcp.,i. 502,503 (Cganol/iamnus); 

 v. 388; Ann., ii. 217 ; iv. 411; vii. 516. 



