THE BULB BOOK 



Leaves usually opposite, without stipules. Flowers hermaphrodite, 

 regular. Calyx inferior, 5-lobod. Corolla gamopetalous, rotate, bell- 

 shaped, or funnel- or salver-sliaped. Stamens 5, free, or often united 

 in a tube round the stigma. Tollen waxy. 



Generadt scribed. — Asclepias, BiiACHYSTELMA, Cekopegia, Fockea. 



Nat. Ord. GENTIANE-ffi. Characters. — Leaves usually opposite, 

 entire, without stalks or stipules, often strongly 3-5-nerved, and 

 sometimes connate. Flowers usually regular, hermaphrodite, or 

 very rarely polygamous by abortion, solitary, or in 2-3-forked cymes. 

 Calyx inferior, with a bell-shaped or very short tube, and having 4-5 

 (rarely G-10) lobes or segments. Corolla gamopetalous, hypogynous, 

 funnel-, salver-, or bell-shaped, or rotate, with 4-5 (rarely G-12) 

 lobes mostly twisted in bud. Stamens equal in number to the corolla 

 lobes, and inserted on the tube with free filaments. Ovary superior. 



Genus described. — Gentiana. 



Nat. Ord. BORAGINB^. Characters. — Roughly pubescent or 

 hairy plants, with leaves usually alternate, entire, toothed, or very 

 rarely lobed. Flowers in crozier-like racemes or panicles, usually 

 hermaphrodite. Calyx inferior, with a bell-shaped tube, usually with 

 5 teeth or lobes. Corolla gamopetalous, funnel-shaped, tubular, 

 salver-, or bell-shaped, or somewhat rotate, with 5 lobes. Stamens 

 equal in number to the corolla lobes and alternate with them. 



Genus described. — Symphytum. 



Nat. Ord. CONVOLVULACE^. Characters. — Plants or shrubs 

 with WL-ak, trailing, twining, or hiuh climbing stems. Leaves alternate, 

 often heart-shaped, entire, sinuate-toothed, palmately or rarely 

 pinnately lobed or dissected. Stipules none. Flowers in axillary 

 or terminal racemes, or solitary, regular, usually hermaphrodite. 

 Calyx inferior, in 5 divisions. Sepals often free or slightly united at 

 the base, much imbricated. Corolla gamopetalous, hypogynous, 

 funnel-shaped, tubular, salver-, or bell-shaped, 5-lobed or nearly 

 entire, plaited, convolute or twicted in bud. Stamens 5, inserted in 

 the base of the corolla tube, and alternate with its segments ; fila- 

 ments often dilated at the base. Ovary superior. Style 1, usually 

 divided at the top. Capsule 1-4-celled, few-seeded. 



Genus described. — Ipom^ea. 



Nat. Ord. SOLANACE^. Characters. — Herbs with alternate or 

 nearly opposite, undi\ided, dissected, or lobed leaves. Flowers 

 hermaphrodite, usually regular. Calyx inferior, gamosepalous, 



52 



