Orobanche. | LV, OROBANCHACE. 321 
less numerous than those’ usually’ distinguished, may on a more careful 
observation prove to be mere varieties of each other, 
Ono bract only under each flower. Plant with little or no blue, 
‘Stout plant. 1 to 3 feet high, with numerous flowers in a 
dense spike. 
Plant dingy-brown, on shrubby Leguminosae. Stamens 
glabrous below 1. O. major. 
Plant more or less yellow, o on Centaurea and other herbs. 
Stamens hairy below  . - 4. O. elatior. 
Plant seldom above a foot high. Spike short, or with the 
lower flowers distant. 
-. Plant of a dingy-brown, or with a reddish tint, Tube of 
the corolla broad. 
Calyx of 2 entire or unequally divided sepals, Plant 
red-brown, on Thyme . é F r - & O. rubra. 
Calyx of two equally divided sepals, Plant light or 
dark-brown, on Galium 2. O. caryophyllacea, 
Plant of a light yellowish-brown or purplish, the flowers 
‘ ‘often tinged with blue. Tube of the corolla narrowed 
above the base. . 5. O. minor, - 
Three bracts to each flower, one underneath, anda small one 
on each side. Plant often bluish. 
‘Stem always simple. Calyx 5-toothed or -lobed . P » 6. O. cerulea. 
Stem often branched. Calyx 4-toothed or -lobed. J - 7 O. ramosa, 
' 1, O. major, Linn. (fig. 716). Great Broomrape. This, our largest 
species, as it is first developed is of a pale yellow, but very soon assumes in 
every part a dingy purplish-brown colour. Stem simple, stout, from 1 to 
13 or 2 feet high, much thickened at the base, with lanceolate scales, which 
are much shorter and broader at the base of the plant.. Flowers closely 
sessile, with one bract to each, forming a dense spike at least half the 
length of the whole plant. Calyx more or less deeply divided into 2 or 
4 lanceolate lobes. Corolla ¢ to 1 inch long; the tube nearly as broad as 
long, curved with a very oblique limb; the upper lip entire or shortly 
2-lobed, the lower one 3-lobed, with the middle lobe usually, but not always 
larger than the lateral ones, and all the lobes toothed and wavy, although 
less so than in many species. The upper part of the style and stamens are 
usually covered with short glandular hairs, which are wanting in the lower 
parts. O. Rapum, Thuill. 
On the roots of the shrubby Leguminous plants, scattered over nearly 
the whole of Europe. Not uncommon in some parts of England, extending 
to Dumfriesshire, chiefly on Broom, more rarely on Furze, rare in Ireland. 
Ll, early summer. 
2. 0. caryophyllacea, Sm. (fig. 717). Clove-scented Broomrape— 
The colour of the plant and size of the ‘flowers are those of O. major, 
but the stem is seldom above 8 or 9 inches high; the flowers are much 
fewer, and further apart; the tube of the corolla is not quite so broad; 
the upper lobes scarcely spreading, and the lower ones nearly equal, and 
the stamens more hairy at cue base. The flowers are usually sweet- 
scented, 
Said to grow exclusively on Galiums : common on the continent of 
Europe, extending across the whole of Asia. In Britain limited hitherto 
to a very few of the southern counties of England. #7. early summer. 
3, O. rubra, Linn. (fig. 718). Red Broomrape.—aA rather smaller 
plant than O. caryophyllacea, which it resembles in the shape of the 
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