ONAGBACE^. (eVENING-PBIMROSE FAMILY.) 137 



3. TERMINALIA, L. 



Flowers in spikes, often polyj^amous. Limb of the calyx deciduous, bell- 

 shaped, 5-cieft, with tlie lobes acute. Petals none. Stamens 10, in 2 rows, 

 lono-er than the calyx. Ovary 2-3ovuled. Style filiform. Drupe dry and 

 indehiscent, 1-seeded. Seed almond-like. Cotyledons spirally convolute. — 

 Trees or shrubs, with mostly alternate leaves, which are crowded at the summit 

 of the branches. 



1 . T. Catappa, L. Leaves short-petioled, softly pubescent when young, 

 at length smoothish, obovate, wedge-shaped but truncated or slightly cordate at 

 the base, with a depressed gland on each side of the midrib near the base ; spikes 

 very slender, shorter than the leaves, the upper flowers sterile ; drupe ovate, acute, 

 compressed, with the margins somewhat winged. — South Florida, — A large tree. 

 Leaves 4' -8' long. Flowers minute, pale green. 



Obder 55. ONAGRACEiE, (Evening-Primrose Family.) 



Calyx adherent to the ovary, and often produced into a tube beyond it, 

 2-6-lobed, valvate in the bud. Petals as many as the lobes of the calyx, 

 inserted into its throat, convolute in the bud, sometimes wanting. Stamens 

 as many or twice as many, inserted with the petals. Ovary 2 - 4-celled. 

 Placenta central. Style solitary : stigma capitate or 2 - 4-lobed. Cap- 

 sule loculicidally dehiscent or indehiscent. Seeds anatropous, with little 

 or no albumen. — Chiefly herbs. 



Suborder I. ONAGRACE^. Styles slender. Fruit 4-valved 

 (indehiscent in Gaura). Seeds attached to a central placenta, without 



albumen. 



* Calyx-tube produced beyond the ovary. 



1. GAURA. Capsule nut-like, indehiscent, 1 - 4-seeded. 



2. (ENOTHERA. Capsule 4-valved, many-seeded. 



* * Calyx-tube not produced beyond the ovary. 



3. EPILOBIUM. Stamens 8. Petals 4. Seeds comose. 



4. JUSSI^A. Stamens 8 - 12. Petals 4-6. Capsule long. Seeds naked. 



5. LUDWIGIA. Stamens 4. Petals 4, or none. Capsule short, many-seeded. 



6. CIKCiEA. Stamens 2. Capsule obovate, 1-2-seeded. 



Suborder II. HALORAGE^. Styles very short or none. Fruit 

 indehiscent. Seeds suspended, solitary in each cell. Albumen thin. — 

 Flowers minute, axillary. 



V. PROSERPINACA. Flowers perfect. Stamens 3. Capsule S-angled. 



8. MYRIOPHYLLUM. Flowers monoecious. Stamens 4-8. Capsule 4-angIed. 



1. GAURA, L. 



Calyx-tube much produced beyond the ovary, the limb 3 -4-lobed, reflexed, 

 deciduous. Petals 3-4, clawed, unequal or turned to the upper side. Stamens 

 12* 



