25. Median and lateral glands present. Filaments without an appendage. Stigma 2-lobed. Fruit winged, 4-celled, indehiscent. Seeds 4; funicle very short. Embryo spirally twisted; radicle incumbent. Plants covered with glandular tubercles. Leaves toothed.--Species 1. North Africa. Used medicinally. =Bunias= L. Median glands absent. Filaments usually appendaged. Stigma obscurely lobed. Fruit dehiscing in two valves. Embryo not spiral; radicle accumbent. Plants without glandular tubercles.--Species 13. North and South Africa. Some are used in medicine or as ornamental plants. (Including _Meniocus_ Desv.) =Alyssum= L. 26. Fruit-valves with a large, wing-like appendage near the top, projecting inwards between the seeds. Style long. Seeds 4. Leaves toothed.--Species 1. North Africa. “Rose of Jericho.” =Anastatica= L. Fruit-valves without an appendage. 27 27. Fruit-valves boat-shaped, laterally compressed; partition narrow. Stigma sessile. Seeds 4.--Species 2. North Africa. (Including _Hinterhubera_ Reichb. and _Hornungia_ Reichb.) =Hutchinsia= R. Br. Fruit-valves flat or convex, dorsally or not compressed; partition broad. 28 28. Fruit-valves strongly convex; partition thick, woody. Fruit elliptical, tapering into the style. Seeds 2. Median glands wanting. Flowers short-stalked.--Species 1. North-west Africa (Algeria). =Euclidium= R. Br. Fruit-valves flat or slightly convex; partition thin, membranous. 29 29. Median glands wanting. Partition of the fruit without fibres. Fruit orbicular. Spinous undershrubs.--Species 1. North-west Africa. (Under _Alyssum_ L.). =Ptilotrichum= C. A. Mey. Median and lateral glands present. Partition of the fruit with scattered fibres.--Species 6. North and South Africa, Cape Verde Islands, and St. Helena. Some are used as ornamental or medicinal plants. (_Koniga_ Adans., under _Alyssum_ L.) =Lobularia= Desv. 30. Petals yellow. 31 Petals white or red. 34 31. Sepals, at least the lateral, saccate at the base. Shorter filaments with a tooth-like appendage. Fruit elliptical, flat. Seeds numerous, winged.--Species 1. North-east Africa (Egypt). (Under _Farsetia_ Desv.) =Fibigia= Medik. Sepals not saccate. 32 32. Filaments, at least some of them, with an appendage, more rarely without, but then, as usually, seeds 2-8. Fruit-valves marked with a mid-rib at the base. (See 25.) =Alyssum= L. Filaments without an appendage. Seeds 10 or more. Fruit-valves with the mid-rib extending to the top. 33 33. Fruit ovate or elliptical, with rather flat valves and a faint middle-nerve. Radicle accumbent.--Species 5. North-west Africa. Some are used as ornamental or medicinal plants. (Including _Erophila_ DC.) =Draba= L. Fruit obovate or pear-shaped, with very convex valves and a strong middle-nerve. Radicle incumbent. Leaves sagittate.--Species 3. North Africa. They yield oil and medicaments. =Camelina= Crantz 34. Petals red. Stigma 2-cleft. Seeds winged. Hairs 2-cleft. (See 13.). =Farsetia= Turr.