Stigmas entire. Flowers white or red. Spathe-bracts entire. Leaves long.--Species 2. South and East Africa. Used as ornamental plants. =Dierama= C. Koch 20. Style-branches linear, slightly dilated, short. Outer spathe-bract brown.--Species 20. South Africa. Some are used as ornamental plants. (Including _Morphixia_ Ker). =Ixia= L. Style-branches subulate. Spathe-bracts green or brown at the tip. 21 21. Style long, with short branches.--Species 35. South Africa, southern Central Africa, and Madagascar. Some are used as ornamental or medicinal plants. =Geissorrhiza= Ker Style short, with long branches. 22 22. Underground part of the stem a root-stock. Perianth red. Filaments as long as or longer than the anthers.--Species 2. South Africa. Used as ornamental plants. =Schizostylis= Backh. & Harv. Underground part of the stem a corm. Filaments short.--Species 35. South Africa and mountains of Central Africa. Some are used as ornamental plants. =Hesperantha= Ker 23. (5.) Style-branches undivided, very short or thread-shaped or somewhat broadened at the top, but not petal-like, nearly always alternate with the stamens. 24 Style-branches more or less divided or petal-like, opposite the stamens. Perianth with a short tube or without a tube. Fruit not enclosed by the spathe. 32 24. Perianth with a distinct tube. Filaments free. Style-branches very short. Fruit, wholly or for the greater part, enclosed by the spathe. [Tribe ARISTEAE, Subtribe ARISTINAE.] 25 Perianth divided nearly or quite to the ovary. Style-branches usually long. Fruit not enclosed by the spathe. [Tribe SISYRINCHIEAE.] 30 25. Perianth-segments very unequal, the inner much larger than the outer, blueish, the outer black; tube short. Spathes 2-3-flowered, solitary or in corymbs.--Species 1. South Africa (Cape Colony). =Cleanthe= Salisb. Perianth-segments almost equal. 26 26. Stem and leaves without green colour. Leaves short, scale-like. Flowers in umbel-like cymes. Perianth white, with a short tube.--Species 1. Madagascar. =Geosiris= Baill. Stem and leaves green. Leaves long, linear or sword-shaped. Perianth blue, rarely yellowish or whitish. 27 27. Spathes 3-or more-flowered, solitary or in spikes, racemes or corymbs. Herbs. Perianth with a short tube.--Species 30. Southern and tropical Africa. Some are used as ornamental or medicinal plants. =Aristea= Ait. Spathes 1-2-flowered. Undershrubs. 28 28. Perianth with a short tube and clawed segments, blue. Filaments long. Spathes in heads.--Species 1. South Africa (Cape Colony). =Klattia= Bak. Perianth with a long tube. Filaments short. 29 29. Perianth blue, glabrous, with a cylindrical tube. Filaments awl-shaped. Anthers small. Spathes solitary or in corymbs.--Species 2. South Africa (Cape Colony). Used as ornamental plants. (Under _Aristea_ Ait.) =Nivenia= Vent.