URE 



OR, BOTANICAL DICTIONARY. 



URT 



77$ 



the whole surface of several kinds of Boletus, and even pene- 

 trating their substance, in the form of a yellow powder, which 

 stains the fingers when touched. 



2. Ui-edo Alchemilte ; Ladies' Mantle Blight. Crowded, 

 yellow, breaking out into nearly parallel lines. Found in 

 Germany, on the leaves of Alchemilla Vulgaris. 



3. Uredo Euphorbias Helioscopise ; Spurge Blight. Scat- 

 tered, nearly globular, prominent, yellow. This is often 

 found in summer upon the plant after which it is named. 



4. Uredo Linearis ; Long Linear Blight. Linear, paral- 

 lel, very long, yellow, staining; afterwards assuming a darker 

 colour. Found on the leaves of the Poa Aquatica. 



5. Uredo Rubi Fruticosa; Bramble Blight. Minute, 

 nearly globular, powdery, bright yellow, deciduous. This, as 

 its trivial name imports, occurs on the leaves of Brambles. 



6. Uredo Rubi Idoei ; Raspberry Blight. Scattered, yel- 

 low, somewhat conical, breaking out in curved lines. Found 

 on the upper surface of Raspberry-leaves. 



7. Uredo Tussilaginis; Colt's-foot Blight. Scattered, in 

 subconcentric, reddish-orange dots, which at length become 

 confluent. Found in autumn on the leaves of the Colt's-foot, 

 which it at length covers with orange powder. 



** Powder brown, bay, chestnut, or somewhat blackish. 



8. Uredo Suaveolens; Sweet-scented Blight. Confluent, 

 fragrant, unequal : powder a pale brownish-purple. Often 

 found on the leaves of Serratula Arvensis in summer. 



9. Uredo Viciae Fabee; Bean Blight. Crowded, orbicular, 

 or partly irregular, depressed; powder brownish-chestnut. 

 Found abundantly upon the stem, and particularly the 

 leaves, of the Common Bean. 



10. Uredo Bullata; Tumid Blight. Prominent, bladdery : 

 powder chestnut-coloured ; seeds constricted in the middle. 

 Rare ; found on the stems of umbelliferous plants. 



11. Uredo Anemones; Anemony Blight. Rather large, 

 depressed, bursting from a longitudinal fissure in the cuticle 

 of the leaf: powder copious and black. Found in spring, on 

 the curled leaves of Anemone Nemorosa. 



*** Powder white. 



12. Uredo Candida; Cream Blight. Shapeless, tumid, 

 white. This is found throughout the summer on the branches 

 and stalks of Shepherd's Purse, which appear greatly swollen, 

 twisted, abounding with whitish fetid powder, which bursts 

 irregularly through the shining cuticle. There are two vari- 

 eties, one smaller and more depressed, found on different 

 species, of Tragopogon : the other also smaller, roundish, but 

 variable in shape, found on Alyssum Calycinum. 



13. Uredo Cheiranthi ; Stock Blight. Scattered, nearly 

 globular, prominent, white. This, which is very scarce, 

 occurs on the foliage of Cheiranthus Incanus. 



** Powder blackish or brown, parasytical on the parts of 

 fructification of different plants. 



14. Uredo Segetum; Corn Blight, or Smut. Powder 

 copious, black, produced within the glumes of grasses. This 

 generally appears like the transformation of the substance of 

 the seed, in whole ears of Barley, Wheat, Oats t or even 

 Agrostis, into a fetid sooty powder, and constitutes the dis- 

 ease termed Smut by farmers. See Blight. 



15. Uredo Caricis; Carex Blight. Powder black, naked, 

 encompassing the seeds. Found upon the fruit of different 

 species of Cavex, especially the Pilulifera. 



16. Uredo Tragopogi Pratensis; Goafs-beard Blight. 

 Powder copious, brownish-purple. Found in summer upon 

 the receptacles of Tragopogon. 



17. Uredo Violacea ; Violet-coloured Blight. Powder of 

 a violet purple. Found in the antheree of flowers. This is 

 probably only a disease of the flower. 



VOL. II. 131. 



Urena; a genus of the class Monadelphia, order Polyan- 

 dria. GENERIC CHARACTER. Calix : perianth double; 

 outer one-leafed, fire-cleft; segments wider; inner five- 

 leaved ; leaflets narrow, angular, permanent. Corolla : 

 petals five, oblong, wide at the tip, blunt with a point, 

 narrower at the base, growing to the tube of the stamina. 

 Stamina : filamenta numerous, united at bottom into a tube, 

 free at top; antheree roundish. Pistil: germen roundish, 

 five-cornered ; style simple, length of the stamina, ten-cleft ; 

 stigmas headed, hairy, reflexed. Pericarp : capsule round- 

 ish, echinate, five-cornered, five-celled, or soluble into five 

 close cells. Seeds: solitary, on one side roundish, on the 

 other angular, compressed. 'ESSENTIAL CHARACTER. 

 Calix: double, outer five-cleft. Capsule: five-cleft, divisible 

 into five parts, with the cells closed, and one seed in each. 

 All the plants of this genus are propagated by seeds, which 

 should be sown upon a hot-bed early in the spring. When 

 the plants are fit to remove, transplant them into pots, which 

 plunge into a fresh hot-bed to bring them forward, and after- 

 wards treat them in the same manner as the tender sorts of 

 Hibiscus. If the plants be brought forwards in the spring, 

 and afterwards placed in the stove or under a deep frame, 

 they will ripen seeds in the first season, and if they should 

 not, they may be preserved through the winter in the stove, 

 and will ripen their seeds in the following season, after which 

 the plants seldom continue. The species are, 



1. Urena Lobata; Angular-leaved Urena. Leaves round- 

 ish-cordate, angular, three-glanded underneath. Stalk two 

 feet high, becoming woody towards autumn : it sends out a 

 few side-branches, which are taper, stiff, and have a dark 

 green bark; flowers axillary, solitary, sessile, shaped like 

 those of the Mallow, but small, and of a deep blush-colour. 

 Native of China and Cochin-china. 



2. Urena Reticulata ; Netted-leaved Urena. Leaves one- 

 glanded underneath, lower ones three-lobed, upper ones 

 fiddle-shaped. Stem shrubby, three-feet high, branched; 

 the branches and footstalks somewhat downy. Native of 

 South America. 



3. Urena Tricuspis ; Three-pointed Urena. Leaves one- 

 glanded underneath, three-lobed, acuminate ; stem rough- 

 haired. Native of the islands of Mauritius and Bourbon. 



4. Urena Americana; American Urena. Leaves trifid, 

 entire at the base, their under surface very soft, and finely 

 downy; stem frutescent, round, scarcely scabrous. Found 

 in Surinam arid Barbadoes. 



5. Urena Sinuata; Cut-leaved Urena. Leaves three-glanded 

 underneath, sinuate, five-lobed; lobes angular, toothletted, 

 obtuse ; stem suffruticose, upright, three feet high, with as- 

 cending branches ; flowers rose-coloured, small, subsolitaiy, 

 axillary. Native of the East and West Indies. 



6. Urena Multifida; Jagged-leaved Urena. Leaves one- 

 glanded underneath, hirsute, five-lobed ; lobes oblong, acu- 

 minate, gash-toothed ; stem much branched ; flowers some- 

 what racemose, yellow. The whole plant is rough-haired. 

 Native of the Mauritius. 



7. Urena Procumbens ; Trailing Urena. Leaves o.blong, 

 sinuate, serrate ; stem procumbent ; flowers larger than the 

 leaves, saffron-coloured, axillary, clustered. It is found in 

 sandy places in China and Cochin-china. 



8. Urena Viminea; Rhomb-leaved Urena. Leaves one- 

 glanded, somewhat rhombed, toothed, hoary beneath. Na- 

 tive of Brasil. 



Urtica; a genus of the class Monoecia, order Tetrandria. 

 GENERIC CHARACTER. Male Flowers. Calix : peri- 

 anth four-leaved ; leaflets roundish, concave, obtuse. Co- 

 rolla: petals none; nectary in the centre of the flower, cup- 

 9 M 



