138 Key to the System of 



ni&RXAXVTHUS. 



677. Petals disconnected. 



Quite dwarf ; leaves small, from ovate- to linear-cuneate or 

 verging into an elliptic or lanceolar form, often indented 

 at the summit, flat or recurved at the margin, soon 

 glabrous ; flowers small, solitary or sometimes two or 

 three together ; petals white, often tinged with red ; 

 fruit small, quadrate- or renate-orbicular, bent down- 

 ward ; seeds wrinkled. M. prOCUlllbens. 



Petals cohering into a tube. 



Twining ; leaves rather large, from ovate- to lanceolar- 

 elliptical, often somewhat bilobed at the base ; flowers 

 pendent, quite long ; petals outside usually green-yel- 

 lowish towards the base, orange-colored towards the 

 middle, yellowish towards the summit and throughout 

 inside ; fruit narrow-ellipsoid, dry. Figure 10. 



M. bignoniaceus. 



RUTACE AE. 

 ACRONYCHIA. 



678. Fruit quadrangular. 



Glabrous ; leaves consisting of one or rarely of three elliptic 

 or ovate entire rather thin leaflets ; flowers in cymes ; 

 petals pale, contiguous before expansion, much longer 

 than the sepals ; filaments and style somewhat beset with 

 short hairlets ; fruit whitish. A. laevis. 



GEXJERA. 



679. Leaves short-stalked, narrow, equally green on both 



sides. 



A tall shrub, finally arborescent ; leaves rather long, entire, 

 usually broad- linear, the carinular venule only perceptible; 

 panicle few-flowered ; petals small, yellowish-white, con- 

 tiguous before expansion ; ovularies with one ovule each ; 

 pericarp very imperfectly separating an inner layer 

 (endocarp) ; outer portion of seed (testa) hard, shining- 

 black. G. parviflora, 



ERXOSTEIKON. 



680. Petals contiguous before expansion ... ... 681 



Petals overlapping before expansion ... ... ... 697 



