186 



ORDER LXXXV. CONVOLVULACE^ MORNING-GLORY-TRIBE. ORDER LXXXVI. SOLANACE.E. 



1. Gr. tricolor. 



Three-colored Gilia. 



Stem erect, nearly smooth ; leaves alternate, twice and thrice pinnatifid ; 

 segments narrowly-linear ; flowers 3 6 together, in cymes, arranged in panicles, 

 bractless ; corolla 2 3 times as long as the calyx, of 8 colors ; the limb pale- 

 blue, tinged with pink ; the throat purple ; the tube yellow, very short, in- 

 cluded in the calyx. An elegant garden annual, about a foot high. 



3. POLEM6NIUM. 



Calyx campanulate, 5-cleft. Corolla rotate-campanulate, 5- 

 lobed, erect ; tube very short. Stamens equally inserted at the 

 summit of the corolla tube. Filaments furnished with hairy ap- 

 pendages at base. Cells of the capsule few, many-seeded. Per. 



1. P. coernleum. Greek Valerian. 



Stems stout, clustered, smooth, simple, erect, hollow; leaves mostly radical, 

 alternate, in long, channelled petioles, pinnately parted into 11 IT divisions; 

 segments sessile, ovate-lanceolate, nearly opposite, acuminate ; odd one lanceo- 

 late ; flowers erect, in a terminal, corymbose panicle ; calyx as long as the co- 

 rolla-tube; corolla blue, rather large. An elegant garden plant, 12 ft. high, 

 common In cultivation. June. 



OKDEK LXXXV. Convolvulacese. Morning- 

 glory-tribe. 



SYNOPSIS OF THE GENERA. 



SUBORDER I. Convolviilese. 



Seeds with large cotyledons. Herbaceous, usually climbing plants with 

 green foliage. 



1. CoNv6i,vuuj8. Calyx without bracts at base. Stamens included. 



2. CALYSTEGIA. Calyx with 2 large, leafy bracts at base. 



8. QCAMOCLIT. Sepals 5, usually mucronate. Stamens exsert 



SUBORDER II. Cnscutinefe. 



Seeds without cotyledons. Twining, parasitic plants, destitute of green 

 herbage, all included in 4. CTTSCUTA. 



1. CONVOLVULUS. 



Calyx 5-parted, naked. Corolla campanulate, funnel-form; 

 limb with 5 plaits, and the border entire, or 5-lobed. Stamens 

 included in the corolla, rarely slightly longer than the limb. Style 

 1, often 2-cleft at apex. Capsule 2 4-celled, 4 6-seeded. 



1. C. purptireus. Common Morning-glory. 



Stem twining, rough with reflexed hairs; leaves cordate, entire; peduncles 

 elongated, 2 5-flowered ; pedicels thickened; sepals hispid, ovate-lanceolate, 

 acute-; corolla funnel-form, large, 2' long, with a spreading, entire border; color 

 varying from dark purple to pale flesh-color, in each case striped with various 

 shades. A common climber, cultivated every where, and sometimes springing 

 up spontaneously around houses and gardens. The flowers open at sunrise and 

 close early in the forenoon. June Sep. An. 



2. C. Batatas. Sweet Potato. 



Stem terete, prostrate snd creeping, rarely twining, hispid ; leaves cordate- 

 hastate, angular, 5-veined, nearly or quite smooth ; flowers large, purple or 

 white, in long peduncled fascicles ; sepals lanceolate, acuminate. The common 

 Sweet Potato cultivated largely in the Southern and Middle States. The tubers 

 are thickened portions of its creeping rhizoma, or thickened off-shoots from it 



2. CALYSTEGIA. 



Calyx 5-parted, included in 2 large, leafy bracts. Corolla 

 funnel-form, varying to campanulate, with 5 plaits or folds ; the 

 limb entire or obscurely 5-lobed. Stamens nearly equal, shorter 

 than the limb. Style 1. Stigmas 2. Ovary imperfectly 2 4- 

 celled. Capsule 1-celled, 4-seeded. Per. 



1. C. Sepiura. Wild Morning-glory. 



Stem twining, mostly smooth; leaves sagittate, acuminate ; lobes truncate, 

 and often toothed at base; peduncles sharply 4-angled, 1 -flowered; bracts cor- 

 date, much longer than the concealed calyx ; flowers large, 2' long, white, 

 varying to pale rose-color, opening Before sunrise and closing early in the day, 

 except in cloudy weather. A common, rank climber, in low, damp thickets. 

 Stem 510 ft. long. A variety occurs on sandy shores, with prostrate, not 

 climbing, more or loss pubescent stems. June July Per. 



3. QUAMOCLIT. 



Sepals 5, mostly mucronate. Corolla tubular cylindric. Sta- 

 mens exsert. Style 1. Stigma capitate, 2-lobed. Ovary 4-cell- 

 ed ; cells 1 -seeded. An. 



1. Q. vulgaris. 



Cypress Vine. 



Smooth; stem very slender, twining; leaves deeply pinnatifid; segments 

 linear, parallel, acute ; peduncles 1-flowered ; flowers small, brilliant, scarlet, 

 varying to crimson and rose-color; sepals ovate-lanceolate. An extremely de- 

 licate and beautiful plant, native in the South, frequent in cultivation. July 

 Aug. 



4. CUSCUTA. 



Calyx 5, rarely 4-cleft. Corolla globose-campanulate ; border 

 spreading, 5, rarely 4-cleft. Stamens 5, rarely 4, inserted into the 

 tube of the corolla with a scale-like appendage at base. Stigmas 

 2. Capsule 2-celled ; cells 2-seeded. An. 



1. C. Gronovii. Dodder. 



Plant leafless, parasitic, destitute of all verdure; stem filiform, orange-yel- 

 low; flowers sessile, in dense clusters, white ; corolla campanulate, withering 

 at the base of the globose capsule ; scales of the stamens large and much frins- 

 ed. An exceedingly delicate, parasitic vine, destitute of all green color. The 

 seed germinates in the soil, and at first the plant draws thence its whole suste- 

 nance, but afterwards, climbing over other plants, it supports itself from tlipir 

 juices, which it absorbs by means of little radicles, while it withers away at 

 base, and soon loses all direct communication with the ground, and becomes 

 entirely parasitic. The yellowish-white flowers grow in large, dense clusters, 

 which are sometimes found alone, the stems having entirely withered away. 

 The stem twines from right to left. July Sep. 



ORDER LXXXVI. Solanacese. Potato-tribe. 



SYNOPSIS OF THE GENERA. 



* Corolla with a proper tube. 



1. PETUNIA. Calyx-tube short; limb with 5 leafy lobes. Corolla salver- 

 form, with 5 unequal lobes. 



2. NICOTIANA. Calyx tubular. Corolla funnel-form, with 5 equal lobes. 

 Capsule not prickly. 



3. DATURA. Calyx tubular, inflated. Corolla funnel-form, 5-angled, scarcely 

 lobed. Fruit prickly. 



10. LYOIUM. Calyx short. Corolla tubular, closed at the throat by the 

 bearded filaments. Stamens exsert. Trailing or climbing shrubs. 



* * Corolla with a very short tube, or none at all. 



4. NICANDRA. Calyx 5-cleft, with 5 compressed angles, enlarged and blad- 

 der-like in fruit, inclosing the 3 5-celled berry. Corolla campanulate, blue. 



5. PHYSALK. Calyx inflated after flowering, inclosing the 2-celled berry. 

 Corolla rotate-cam pan ulate, yellowish. 



6. CAPSICUM. Corolla rotate. Capsule 2 3-celled, dry and leathery. 



7. SoLANUM. Corolla rotate. Berries 2-celled. 



8. LYCOPERSICUM. Corolla rotate. Berries 3 6-celled. 



9. ATROPA. Corolla campanulate. Berry 2-celled. 



1. PETUNIA. 



Calyx with a short ube and a 5-cleft leafy limb. Corolla salver- 

 form ; tube cylindric ; limb in 5 unequal, flat, folded lobes. Sta- 

 mens 5, unequal, included, inserted into the middle of the corolla 

 tube. Capsule 2-valved. 



1. P. violacea. Purple Petunia. 



Stem weak, hairy, viscid ; leaves broad-ovate, acute, on short, winged peti- 

 oles, entire ; peduncles axillary, solitary, as long as the leaves, and scarcely 

 longer than the swelling tube of the corolla ; sepals obtuse ; corolla-limb bright 

 purple, divided into 5 unequal, rounded, acute lobes, of which the uppermost is 

 smallest. A pretty plant, quite common in cultivation. Stems trailing or climb 

 ing, 2 4 ft. long. An. or bien. July till frost. 



2. P. alba. White Petunia. 



Stem weak, hairy, viscid; leaves ovate, acute, upper ones sessile; flowers 

 axillary, solitary, greenish- white, fragrant; corolla-tube scarcely expanded at 

 top, 2 -8 times as long as the obtuse sepals, the limb flat and spreading. Dis- 

 tinguished from the last by the stouter habit, more slender corolla-tube, and its 

 white flowers, the color of which seems to be constant. It is frequently consi- 

 dered a variety of the last 



2. NICOTIANA. 



Calyx urn-shaped, 5-cleft. Corolla funnel-form, or salver-form, 

 regular; limb plaited, 6-lobed. Stigma capitate. Capsule 2- 

 celled, 2 4-valved. Seeds minute. An. 



