BORAGINACEAE— GENTIANACEAE 17 



Nicotiana- -Nicotiana, Tobacco 

 for Nlcot, .in eai ly ua< 

 1. Flowers white, at least within, opening at nightfall N. aldta 



Flowers usually some shade of red, day-blooming 



a. Leaves sessile, decurrent; flowers red or purple N. 



li. Leaves stalked; flowers yellowish it greenish A. 



Petunia — Petunia 



1 .\.iti\ >• nam 



Leaves ovate, hairy, nearly sessile; flowers varicolored, often double /'. hybrida 



Boraginaceae — Borage Family 

 Herbs with simple alternate leaves, often rough-hairy; sepals 5, united, petals 5, united, stamens 

 5. ovary 4-celled or deeply 4-lobed, separating at maturity into 4 nutlets, stigma 1 or 2; flower 

 syncarpous, sympetalous, hypogyndus, regular, or irregular in one genus. 

 1. Ovary divided into 4 parts 



a. Corolla regular 



(1) Corolla wheel-shaped, tube lacking Borago 



Corolla more or less tubular, with scale-like appendages in the 

 throat 



(a) Flowers blue to purple 



\. Nutlets bur like, with hooked prickles Cynoglossum 



y. Nutlets smooth «.>'<I 



(b) Flowers yellowish white Symphytum 



b. Corolla irregular Echium 



2 1 'vary entire, but the ripe fruit separating into 2 or 4 nutlets Heliotropium 



Borago — I Id rage 



(Supposed to be from corago, because of reputed virtues as a cordial) 

 Leaves oval to lance-oblong, bristly ; flowers blue to purple B. officinalis 



( lynoglossum — I [oundstongue 



(Gr. kynos, dogr, glossa, tongue) 

 Leaves spatulate to lance-oblong, downy, flowers red purple C. officinale 



Anchusa — Alkanet 



(Gr. enchusa, alkanet, because the root yields a red dye) 

 Leaves lance-ovate, rough; flowers large A. itdlica 



Symphytum — Com troy 



(Gr. symphyton, comfrey, from symphyo, to unite, named from its healing- properties) 

 Leaves lance-oblong, soft-hairy, decurrent S. officinale 



Heliotropium — Heliotrope 



(Gr. heliotropion, a plant which turns toward the sun) 



1. Corolla tube hardly longer than the calyx //. peruzianum 



2. Corolla tube twice longer than the calyx H. corymbosum 



Gentianales Gentian Order 



Gentianaceae — Gentian Family 

 Herbs with opposite simple entire sessile leaves; sepals 4-5, united, petals 4-5, united, stamens 

 4-5, alternate with the corolla lobes, ovary 1-celled, with 2 parietal placentae, stigmas 2, fruit a 

 capsule; flower syncarpous, sympetalous, hypogynous, irregular. 



1. Corolla tubular, blue; flowers solitary or clustered Gcntiana 



2. Corolla wheel-shaped, green ; flowers in a large panicle Frasera 



Gentiana — Gentian 



1 X.imed for King Gentius of Illyria) 

 1. Corolla lobes fringed; flower open G. crinlta: fringed g. 



2 Corolla lobes not fringed; flower closed G. Andreiosii: closed g. 



