328 BORRAGINACE^E. (BORAGE FAMILY.) 



1. T. Canadense, L. Stem tomentose, erect, simple or branched ; leaves 

 short-petioled, ovate-lanceolate, acute, serrate, pubescent above, white-velvety 

 beneath ; flowers mostly alternate, in a long hoary spiked raceme, longer than 

 the subulate bracts; calyx bell-shaped. (T. Virginicum, L.) Swamps and 

 low ground, Florida to Mississippi, and northward. July - Sept. 1J. Stem 

 2 - 3 high. Leaves 2' - 6' long. Flowers purplish. 



ORDER 95. BORRAGINACE^. (BORAGE FAMILY.) 



Herbs or shrubs, with terete or irregularly angled stems, and alternate 

 entire exstipulate mostly rough-hairy leaves. Flowers usually in 1-sided 

 spikes or racemes, which are coiled in the bud. Calyx free, 5-eleft or 

 5-parted, valvate in the bud, persistent. Corolla regular (except No. 6), 

 hypogynous, 5-lobed, imbricated or (in Myosotis) convolute in the bud. 

 Stamens 5, equal, inserted on the tube of the corolla and alternate with 

 its lobes. Ovary 4-celled, with a single ovule in each cell. Style single. 

 Fruit various. Albumen scarce or none. Cotyledons flat or folded. 

 Radicle superior. 



Synopsis. 



TRIBE I. CORDIEJE. Ovary undivided. Style terminal, twice 2-lobed at the apex. 

 Fruit a 4-celled drupe. Cotyledons folded. Albumen none. Shrubs. Flowers in 

 heads or spikes. 



1. CORDIA. Calyx opening regularly, not circumscissile. 



TRIBE II. EHRETIEJE. Ovary undivided. Style terminal, 2-lobed at the apex. 

 Fruit a 4-seeded berry. Cotyledons flat. Albumen scanty. Shrubs. 



2. EHRETIA. Style slender. Flowers corymbose. 



3. TOURNEFORTIA. Style short. Flowers cymose or spiked. 



TRIBE III. HEI/IOTROPE.3S. Ovary undivided. Style terminal, simple. Fruit 

 separating into 2 or 4 nutlets. Chiefly herbs. 



4. HELIOTROPIUM. Fruit separating into 4 nutlets, each 1-seeded. 



5. HELIOPHYTUM. Fruit separating into 2 nutlets, each 2-seeded. 



TRIBE IV. BORRAGEJE. Ovary deeply 4-parted, enclosing the base of the simple 

 style. Fruit of 1 - 4 one-seeded nutlets. Herbs. 



* Throat of the corolla naked. Nutlets not hispid. 

 *- Corolla irregular. 



6. ECHTUM. Corolla funnel-shaped, unequally lobed. 



- -i- Corolla regular. 



7. ONOSMODIUM. Lobes of the corolla erect, acute. Nutlets smooth and stony. 



8. LITHOSPERMUM. Lobes of the corolla rounded. Nutlets smooth or rugose. 



9. MERTENSIA. Lobes of the corolla rounded. Nutlets somewhat fleshy. 



10. MYOSOTIS. Lobes of the corolla convolute in the bud. Nutlets smooth. 



* * Throat of the corolla closed with scales. Nutlets hispid. 



11. CYNOGLOSSUM. Corolla funnel-shaped. Nutlets depressed. 



