120 



OEDEE LXXXII. HTDEOPHTLLACE^. OEDEE LXXXVH. GENTIANACE^. 



lar, rarely irregular, the limb 6-toothed, often -with a ro-w of 

 scales in the throat. Stamens 5, inserted on the corolla alter- 

 nately with its lobes. Orary deeply 4-lobed, or at least separat- 

 ing into 4 portions, when matnre. Style 1, usually central, 

 proceeding from base of the ovary, sometimes terminal. Fruit 

 consisting of 4 achenia. 



A rather lar^e order of mucilaginous, emollient, never poisonous pl;inf=. 

 Borago {Borage), flg. 27, Symphytum {Oomfrey), and Ueliotropinm ilMio- 

 trope), are examples. 



Fig. 27. 



GEOUP VII. 

 Oedee LXXXII. — HydropliyllaceEe. 



Hei'bs. Leaves alternate, or the lower ones opposite, usualty 

 lobed, or pinnatifid. Flowers usually in ciroinate racemes, or 

 unilateral spikes. Calyx 5-oleffc, usually appendaged at the 

 sinuses, persistent. Corolla 5-lobed, regular, with melliferous 

 scales or grooves near the base. Stamens 5, inserted on the base 

 of the corolla, alternate with its lobes. Anthers 2-celled. Ovary 

 free, 1-celIed. Stylo 1, bifid. Stigmas 2. Capsule invested with 

 the permanent oalj'x. Seeds few, crustaceous. 



.'V small order of unimportant, chiefly N. American plants, represented by 

 Ilydrophyllnm ( Water-Leaf, Burr-Flower'), 



Oedee LXXXIII. — Polemoniacese. 



Herbs. Leaves opposite, rarely alternate, simple or com- 

 poimd. Calyx free from the ovary, 5-oleft, persistent. Corolla 

 regular, with a 5-lobed limb, convolute in prefloration. Stamens 

 5, inserted on the corolla, alternately with its lobes, often un- 

 equal in length. Ovary 3-celled. Style 1. Stigma trifid. Cap- 

 sule 3-ceUed, 3-valved, loeulioidal, the valves separating from the 

 3-angled axis, which bears the few, or many seeds. 



A small order consisting chieily of N. American plants. Phlox and Pole- 

 monium {Greek Valerian), are examples. 



Oedee LXXXIV. — Diapensiacese. 



Low, prostrate, evergreen under-shrubs. Leaves crowded, 

 heath-like. Flowers terminal and solitary. Sepals 5, distinct, 

 with 3 bracts at base. Corolla regular, deeply 5-lobed, with the 

 lobes imbricated in prefloration. Stamens 5, inserted by their 

 petaloid tilamerits on the corolla-tube. Anthers 2-oelled, with 

 transverse valves. Ovary 3-celled, free. Style 1. Stigma 3- 

 lobed. Capsule 3-valved. Seeds small, many. 



An order consisting of only two plants, Diapensia Lapponica, native of the 

 White Mountains, and Pyxidanthor.o, found in tlio Pine barrens of N. .Tur.--fy. 



Oedee LXXXV. — ConvolvitlaceEe. 



Herbs, or shrubs; often with ,• milky juieo. Stems trailing 

 or climbing, rarely erect. Leaves alternate, sometimes none. 

 Stipxiles none. Flowers often showy. Sepals 5, usually more or 

 less united at base, persistent. Corolla regular, limb 5-cleft or 

 entire, twisted and plaited in prefloration. Stamens 5, inserted 

 at the base of the corolla, alternate with its segments, when 

 lobed. Ovary 2 — i, rarely 1-oelled, free from the calyx. Style 

 1, rarely more. Fruit a capsule, 2 — 4-celled, opening by septi- 

 fragal dehiscence. Seeds few, large. 



A numerous order of plants, very abundant in the tropics, and often distin- 

 guished by the beauty of their large flowers. Their jnices contain a resinons 

 purgative principle, especially developed in the roots of Convolvulus Jalapa of 

 Mexico, and 0. Scammonia (>Scnmmo«y), of the Levant. Sometimes this prin- 

 jciple is present in so small quantities, that the large farinaceous roots become 

 valuable as articles of food, as in the C. Batatas, or Sweet Pot.ato. 



The suborder, Cuscutinefe, is distingaished by its leafless colored stems and 

 filiform, spirally coik-d embryo, destitute of cotyledons, and is represented by 

 the Ouscuta {Dodder), flg. 8, Plato V. 



Oedee LXXXVI. — Solanacese. 



Herbs, or shnibby plants with a colorless juice. Leaves 

 alternate. Calyx free from the ovary, consisting of 4 — 5 persist- 

 ent sepals, more or less united at base. Coi-oUa regular, rarely 

 slightly irregular, limb 4^5-cleft, plaited in jirefloration. Sta- 

 mens as many as the corolla lobes, alternate with its segments. 

 Ovary 2, and rarely 4 or 6-eelled, with a central placenta. Fruit 

 a many-seeded capsule or berry. 



A large order distinguished usually by the dull Inrid color of their flowei-s. 

 The herbage and fruit are usually pervaded by a powerful narcotic principle, 

 which renders them often violently poisonous and always injurious Their 

 active properties give to many of them importance in a medicinal point of 

 view. Such are the Henbane (ilTyosc^amwfi ?li^e;'), the Belladonna (^i^-n^a 



Fig. 23. 



Belladonna'), and the Bittersweet {Snlanum Duleamara), fig. 1\ The dele- 

 terious Tobacco, also, belongs here. The tuber is sometimes edible, as in the 

 Potato (^otonwm tuberosum) ; and sometimes, also, the fruit i^ wholesome, as 

 in the Tomato {Lycoxiersicum), and the Egg-plant {Solanum Molongena). 



Oedee LXXXYII. — Gentianacefe. 



Herbs, usually smooth, with a watery juice. Leaves usually 

 opposite, rarely alternate, radical or single. Flowers regular, 

 usually tei-minal or axillary, often showy. Calyx of 4 — 12 scjials. 



