THE BULB BOOK 



Series, 3. CalycifloKjE. — Flowers regular or irregular, herma- 

 phrodite or moncBcious. Stamens united or free. 



Nat. Ord. LBG-UMINOS^. Characters. — Leaves with 2 large 

 stipules, simple or often digitately or pinnately compound. 

 Flowers irregular, usually hermaphrodite. Sepals usually 5, more 

 or less united. Petals 5, unequal; the upper one (known as the 

 " standard ") free, larger than the 2 side ones (known as the " wings "), 

 which latter enclose and sometimes adhere to the 2 more or less 

 united and upward curved lower ones (known as the "keel"). The 

 keel usually encloses the 10 perigynous stamens, united in a sheath, 

 or the upper one only free ; rarely all free. Fruit a 1-celled, usually 

 dehiscent pod, with one or more seeds. 



Genera described. — Latiiyeus, Amioia, Apios, Doliohos. 



Nat. Ord. SAXIFRAGACE.aEj. Characters. — Leaves very variable. 

 Flowers usually 2-sexed. Calyx usually 5-lobed. Petals usually 5. 

 Stamens in 4's or 8's, 5's or lO's, with free filaments. Ovary usually 

 of 2 distinct carpels more or less cohering or divergent. 



Genus described. — Saxifeaga. 



Nat. Ord. CUCURBIT ACE.^. Characters. — Mostly climbing 

 or prostrate herbs. The leaves alternate, simple, lobed or divided. 

 The tendrils, when present, are lateral, solitary, simple or branched, 

 and spirally twisted. Flowers monoecious or dioecious, white or 

 yellow, rarely red or blue. Calyx-tube adnate to the ovary ; lobes 5, 

 rarely 3 or 6. Petals 5, rarely 3 or 6, free, or rarely gamopetalous, 

 often confluent with the calyx. Stamens usually 3 (rarely 5, or 1, 

 2, or 4). Fruit inferior, usually fleshy, often large, berry-like, 

 variable in form, and sometimes highly coloured. 



Genera described. — Thladiantiia, Beyonia, Abobea, Geeraed- 

 ANTHUS, Cephalandea, Megaehiza, "Wilbeandia. 



Nat. Ord. BEGONIACB-^. Characters. — Leaves alternate, ■ 

 more or less unequal sided, entire or lobed, irregularly toothed. 

 Flowers monoecious (i.e., male and female separate, but on same 

 plant). Male flowers with 2 large outer sepaloid, and 2 small inner 

 petaloid segments. Stamens numerous, free or united. Female 

 flowers with 2-10 segments. Ovary inferior, winged, usually 

 3-oelled. Styles 2-4, with branched twisted stigmas. 



Genus described. — Begonia. 



Division II. GAMOPETAL^.— Petals more or less united. 



Series 1. EPiGYNiE.— Ovary inferior. Herbs, often with milkv iuice. 



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