LOGANIA FAMILY 657 



Family 102. LOGANIACEAE. Logania Family. 



Herbs, shrubs, or vines. Le;iv(>s opposite or whorled, simple. Flowers 

 perfect, rejijular, 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-cclled (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 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-campaniilate 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 

 verticels, about L5 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. Caljoc 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, mo.stly deciduoiis. 



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



twisted. i; Centaureum. 



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

 recurved. 2. Eu.STOiVL\. 



Style stout, short, persistent, or none. 



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

 Corolla campanulate, funnelforni, or salver-shaped; calyx 4- or S-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. AM.VRELLA. 



Corolla phcate m the smuses, 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. Condrophyll.\. 



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

 ,, „ flowers. 6. Dasysteph.\na. 



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. SvvTiRTL^. 



Style manifest; leaves opposite or verticil late. 



Each division of the coroUa with a single gland; capsule flattened paraUellv 

 to the valves. 



