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Genus Roripa Scop.
Род 343 (17). ПОРЕЧ—-RORIPPA SCOP.¹
Scop., Fl. Cam. ed. 1 (1760) 250.

Fam: Cruciferae Juss. (Brassicaceae)
Genus: Roripa Scop.
English Name: Yellowcresses

Description:

Annual or perennial herbaceous plants with developed rhizomes or with spindly or hirsute roots. Stems creeping or ramble, ascending or upright, branched, rarely not branched. Leaves of stems, rarely assembled in a basic rosette and stems (leaves), feather-like devided or cut off, rarely entire. Inflorescences numerous, clustered, green, without bracts, on the top part of the stems and branches, in the grooves of the leaves, after the flowers blooming of the lower blossoms lengthen. Sepals elliptical, without bag extension at base. Petals back ovate to spade wedge-shaped, gradually narrowed into nail, shorter, slightly longer or up to 2 times longer than the sepals. Stamens 2 + 4, at the base of the short ones, with one large, among others a small nectar gland, all connected by a ring. The ovary sat down. The style is elongated; the stigma is disk-like. Fruit pods or little pods. Seeds in two rows in each well. Insect pollinated. Propagated by seeds and by vegetative shoots.

Table for determination of the species

1   Petals shorter, equal or slightly longer than the sepals ......................................................................................... 2
1* Petals clearly (up to 2 times) longer than sepals ................................................................................................... 3
2   Petals golden yellow, (1.5) 2 - 2.5 (3) mm long, equal to or slightly longer than the petals; pods 1 mm wide, cylindrical, straight .................................................................................................... 4. - R. prolifera (Heuff.) Neilr.
2* Petals pale yellow, 1 - 1.5 (2.8) mm long and 0.7 - 0.8 mm wide, equal to the sepalsls or slightly shorter than them; pods 2 - 2.5 mm wide, ovate cylindrical, slightly sickle-shaped …..... 5. Swamp - R. islandica (Oeder) Borb.
3   Leaves at the base without ears ............................................................................................................................ 4
3* Leaves at the base with ears ................................................................................................................................. 5
4   Fruit (6) 10 - 15 (18) mm long cylindrical pod ........................................................... 3. - R sylvestris (L.) Bess.
4* The fruit is 3 - 4 (6) mm long ovate pe......................................................................... 2. - R. amphibia (L.) Bess.
5   Fruit spherical or ovate to ellipsoidal, up to 6 mm long pod ................................................................................ 6
5* Fruit linearly cylindrical to narrowly lance, 6 - 20 mm pod ................................................................................. 8
6   Stem leaves entire ................................................................................................ 1. - R. austriaca (Crantz) Bess.
6* The stem leaves feathery-like cut .......................................................................................................................... 7
7   Petals 3 - 4 mm long, slightly longer than the sepals. The lower leaves collected in a basic rosette. Stem erect ................................................................................................................................... 6. - R pyrenaica (L.) Reichenb.
7* Petals 5 - 6 mm long, up to 1.8 times longer than sepals. Stem creeping, rooting in the nodes, upward ascending or erect, without base rosette ................................................................................................ 2. - R. amphibia (L.) Bess.
8 The pod (10) is 12 - 20 mm long and 1 mm wide, linearly cylindrical. Petals (3) 4 - 5 mm long, 1.5 - 2 times longer than the sepals. The lower leaves entire, less often feathery-like cut …. 7. - R. lippizensis (Wulf.) Reichenb.
8* The pod is 6 - 10 mm long and 2 mm wide, narrowly lance. Petals 2 - 2.5 mm long, slightly longer than the sepals. The lower leaves feathery-like cut ………………………………...…………….. 8. - R. thracica (Griseb.) Fritsch
6. Developed by B. Kuzmanov.

From    „Флора на НР България”, том IV, БАН, София, (1970)

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Rorippa is a flowering plant genus in the mustard family, Brassicaceae, native to Europe through central Asia, Africa, and North America. Rorippa species are annual to perennial herbs, usually with yellow flowers and a peppery flavour. They are known commonly as yellowcresses.
Rorippa formerly included several species of watercress, now placed in the genus Nasturtium. In particular, R. nasturtium-aquaticum (now N. officinale) and R. microphylla (now N. microphyllum) are often referred to as species of Rorippa.
There are about 75[1] to 85[2][3] species in the genus.

From Wikipedia, the free encyclopedia

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Roripa

The genus Roripa is in the family Brassicaceae in the major group Angiosperms (Flowering plants)
www.theplantlist.org › browse › Brassicaceae › Roripa

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Distribution in Bulgaria: (Conspectus of the Bulgarian Vascular Flora) = conspectus&gs_l= Zlc.
Distribution:
References: „Флора на НР България”, том IV, БАН, София, (1970), Wikipedia, the free encyclopedia, www.theplantlist.org › browse › Brassicaceae › Roripa

SPECIES:

Roripa lippizensis (Wult.) Reichenb._EN.html - the species has no common names

E-mail: krnanev@gmail.com

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