LOGANIA FAMILY 657 



FAMILY 102. LOGANIACEAE. LOGANIA FAMILY. 



Herbs, shrubs, or vines. Leaves opposite or whorled, simple. Flowers 

 perfect, regular, in cymes or panicles. Calyx inferior, 4- or 5-lobed. Cor- 

 olla gamopetalous, 4- or 5-lobed; lobes imbricate or convolute. Stamens 4 

 or 5, alternate with the corolla-lobes. Anthers opening lengthwise. Ovary 

 superior, 2-celled (rarely 3-5-celled); styles more or less united. Ovules 

 solitary or two (rarely numerous) in each cavity, amphitropous or anatro- 

 pous. Fruit sometimes capsular, 2-valved, or a berry or drupe. 



1. BUDDLEIA L. 



Shrubs or tree?, or undershrubs. Leaves opposite, with more or less developed 

 stipules. Flowers in dense heads, rarely in panicles. Calyx campanulate, 4- 

 lobed or 5-lobed. Corolla rotate-campanulate to salverform. Stamens 4, 

 rarely 5; filaments adnate to the corolla-tube. Ovary 2-celled; styles united. 

 Capsule globular or oblong, septicidal, 2-valved. 



1. B. utahensis Coville. Shrub 2-3 dm. high; young branches, leaves, and 

 calyces densely tomentose; leaves linear-oblong, irregularly undulate, revolute- 

 margined, thick, venose-reticulate, 1.5-2 cm. long, obtuse; inflorescence of 2-9 

 verticals, about 1.5 cm. in diameter; calyx-lobes 1-nerved; corolla purple or 

 brownish purple; tube tomentose without; lobes rounded, spreading; anthers 

 sessile in the throat of the corolla. Rocky places : Utah Nev. ' Son. 



FAMILY 103. GENTIANACEAE. GENTIAN FAMILY. 



Annual or perennial caulescent herbs, or in warmer climates rarely shrubs. 

 Leaves normally opposite, sometimes connate at the base. Inflorescence 

 cymose. Flowers regular, perfect. Calyx of 2, 4, or 5, more or less united 

 sepals. Corolla of 4 or 5 more or less united petals; lobes convolute or 

 imbricate, entire or fringed. Stamens as many as the corolla-lobes and 

 alternate with them, partly adnate to ' the corolla. Gynoecium of two 

 united carpels; ovary 1 -celled, superior, with 2 parietal placentae. Fruit 

 a capsule. 



Corolla not spurred. 



Style filiform, mostly deciduous. 



Corolla small, red, rose, or yellowish; tube surpassing the calyx; filaments spirally 



twisted. 1. CENTAUREUM. 



Corolla large, blue, purple, or white; tube much shorter than the calyx; stamens 



recurved. 2. EUSTOMA. 



Style stout, short, persistent, or none. 



Corolla without nectariferous pits, glands (except in species of Amarella), or scales. 

 Corolla campanulate, funnelform, or salver-shaped ; calyx 4- or 5-lobed; stamens 



inserted in the corolla-tube. 

 Corolla without plaits or lobes in the sinuses; calyx without an inter-calycine 



membrane; sepals imbricate. 



Flowers 4-merous, rather large, usually more than 3 cm. long; corolla- 

 lobes more or less fringed or toothed; inner sepals broader, mem- 

 branous-margined. 3. ANTHOPOGON. 

 Flowers 5-merous (rarely 4-merous), small, less than 2 cm. long; outer 

 sepals broader; corolla-lobes never fringed, rarely toothed. 



4. AMARELLA. 



Corolla plicate in the sinuses, the plaits more or less extended in mem- 

 branous lobes or teeth; calyx with an inter-calycine membrane; 

 its lobes valvate. 

 Anthers cordate- versatile ; dwarf annuals or biennials, with terminal 



solitary flowers. 5. CONDROPHYLLA. 



Anthers linear or oblong, extrorse; perennials, with mostly axillary 



flowers. 6. DASTSTEPHANA. 



Corolla rotate; calyx parted to near the base; stamens inserted on the base of 



the corolla. 7. PLEUROGYNE. 



Corolla rotate, with nectariferous pits, glands, or scales. 



Style none; leaves opposite, rarely alternate; corolla without a crown at the 



base. 8. SWERTLV. 



Style manifest; leaves opposite or verticillate. 



Each division of the corolla with a single gland; capsule flattened parallelly 

 to the valves. 



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