LOGANIA FA^MILY 657 



Family 102. LOGANIACEAE. Log.\nia Family. 



Herbs, shrubs, or \ines. Leaves opposite or whorled, simple. Flowers 

 perfect, regular, in cymes or panicles. Cah^x 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. 0^'ules 

 solitary or two (rarelj' numerous) in each cavit}', amphitropous or anatro- 

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



1. BUDDLEIA L. 



Shrubs or trees, 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. Ovarj' 2-celled; styles imited. 

 Capsule globular or oblong, septicidal, 2-valved. 



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

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

 margined, thick, venose-reticulate, L.5-2 cm. long, obtuse; inflorescence of 2-9 

 verticels, about Lo 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. Cal3'x 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 man^' as the corolla-lobes and 

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

 united carpels; ovary 1-celled, superior, ^\ith 2 parietal placentae. Fruit 

 a capsule. 



Corolla not spurred. 



Style flUform, mostly deciduous. 



Corolla small, red, rose, or yellowish; tube surpassing the calj-x: filaments spirally 



twisted. l' Cextaoiei.'ai. 



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

 recurved. 2. EustoM-\. 



Style stout, short, persistent, or none. 



Corolla without nectariferous pits, glands (except ia species of AmareUa), 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 ; calj^s without an inter-calycuie 

 membrane; sepals imbricate. 

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

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

 branous-margined. 3. AXTHOPOGOX. 

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

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



4. "AiLVRELL.\. 



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

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

 its lobes valvate. 

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



soUtary flowers. 5. Coxdrophtll^.. 



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

 flowers. 6. Dastste*pil\x.a.. 



Corolla rotate; calj-x parted to near the base; stamens inserted on the base of 

 the corolla. 7. Pleurogtn'e. 



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



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



base. 8. Sw^ertl\. 



Style manifest; leaves opposite or verticillate. 



Each di-vTsion of the corolla -with a single gland; capsule flattened parallelly 

 to the valves. 



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