Onosmodium. BORAGINACEiE. 83 



Order LXXII. BORAGINACE^. Juss. The Borage Tribe. 



Calyx of five leafy persistent equal sepals, which are more or less united at the 

 base. Corolla regular, 5-lobed, often with a row of scales in the throat. 

 Stamens 5, alternate with the lobes of the corolla. Ovary deeply 4-lobed ; 

 each division with a single suspended ovule : style single, proceeding from the 

 base of the lobes of the ovary. Fruit consisting of four little nuts or achenia. 

 Seeds with little or no albumen : cotyledons plano-convex. — Herbaceous or 

 sometimes shrubby plants, with round stems and alternate usually rough leaves. 

 Flowers often in one-sided racemes which are spirally revolute before expan- 

 sion, mostly without bracts. 



CONSPECTUS OP THE GENERA. 



* Nuis JLced to the receptacle, 

 t Throat of the corolla naked. 



1. ONOSMODirM. Calyx deeply 5-parted. Corolla tubular-campanulate ; the lobes acate, connivent. Style mnch 



eiserted. Nuts ovoid, shining, not perforate at the base. 



2. EcHiuM. Corolla irregular, somewhat campanulate ; the limb obliquely 5-lobed, Nuts tuberculate, not perforate at 



the base, obliquely acuminate. 



3. PcLMo.N'iBii, Calyx 5-parted, somewhat prismatic. Corolla (large) salver-funnelfonn. Nuts not perforate at the 



base, very smooth. 



4. LiTHosPERMUM, Calyx 5-parted. Corolla (small) funnelform. Nuts not perforate at the base, very smooth or 



rarely rugose. 

 6. Batschia. Calyx deeply 5-parted. Corolla (large) salverform; the limb nearly flat; the tube closed at the base by 

 a bearded ring. Nuts not perforate at the base, smooth and shining. 



tt Throat of the corolla more or less clothed vrith scales. 



6. Ltcopsis. Calyx 5-clefl. Corolla funnel-shaped, with a curved tube. Nuts concave at the base. 



7. MyosoTis. Calyx 5-cleft. Corolla salver-shaped ; the throat half closed with convex scales. Nuts perforated at 



the base. 



8. Symphytum. Calyx 5-parted. Corolla cylindrical-campanulate ; the throat closed with subulate scales. Nuts 



TUgous, perforated at the base. 



** Nuis fixed to the style or central column. 



9. Ctnoolossom. Calyx 5-parted. Corolla funnelform ; the throat closed with convex scales. Nuts depressed, covered 



with rigid prickles. 

 10. EcHiNosPERMUM. Culyx 5-cleft. Corolla somewhat salverform ; the throat closed with convex scales. Nuts com- 

 pressed or angular, muricatc on the margin. 



1. ONOSMODIUM. Michx. Jl. I. p. 132; Endl. gen. 3755. ONOSMODIUM. 



[ So named from its resemblance to Onosma, another genus of this order.] 

 Calyx 5-parted. Corolla tubular-campanulate, naked in the throat; the lobes acute and 

 connivent. Style much exserted. Nuts ovoid, shining, fixed by a flat base to the receptacle. 

 — More or less hispid herbaceous plants, with the flowers in terminal leafy racemes. 



11' 



