Fig. 467.—Ruta. Floral diagram.
4. Ruteæ. Ruta (Figs. [465–467]) graveolens is an herbaceous, glaucous, strongly smelling plant with bipinnate leaves and yellow flowers; the terminal flower is 5-merous, the others 4-merous (S. Eur.).—Dictamnus; zygomorphic flower. The individual carpels of the fruit separate from each other, and dehisce like follicles, upon which the internal layer is detached elastically and springs out, carrying the seeds with it. Several species are ornamental plants.
5. Cusparieæ. American. Flowers often zygomorphic with gamopetalous corolla; stamens 5.—Ticorea; Galipea (G. officinalis; S. Am.; “Cortex angosturæ”); Cusparia; Almeidea.
B. The ovary is entire or only slightly grooved; the style is terminal, undivided. The fruit is most frequently a drupe or berry.
6. Toddalieæ. Ptelea; winged fruit. The buds are enclosed in the leaf-sheath. Skimmia; Phellodendron.
Figs. 468–470.—Citrus vulgaris.
Fig. 468.—Branch with compound leaves.
Fig. 469.—Transverse section of fruit.