ISyatemaiiK und Pflanzengeograpnie. 231 



CXVII. Centrolepidacees. 



1828 wurden von Desveaux die Centrolepideen aufgestellt, 

 aus denen dann die Centrolepidaceen wurden. 4 Gattungen mit 

 etwa 30 Arten. 



1. CentroUpidees. Gynecee dialycarpelle, k ovaire uniloculaire et uniovule. 

 Centrolepis Labill. Aphelia R. Br. 



AuBtral., Indo- China. Austral. Tasman. 



2. OaimardUes. Gynecee dialyc-arpelle, avec deux et, plus rarement, trois ou 

 quatre loges k l'ovaire. 



Gaimardia Gaudich. Juncdla F. Mueü. 



Amer. antarct., Nova-Zeland. Austral., Tasman. 



E. Roth (Halle a. S.). 



Baker, J. G., Handbook of the Irideae. 8". XII, 247 pp. 

 London and New- York 1892. 



Verf. lässt in der Vorrede dieses als das letzte seiner Handbücher 

 erscheinen, hoflfentlich ändert sich diese Absicht. 



Am Schluss seiner Einleitung theilt Baker ferner mit, dass sich 

 zur Jetztzeit die Zahl der bekannten Gefässkryptogamen auf etwa 3500 

 belaufe, während die petaloiden Monocotylen ungefähr 5000 betragen. 



Als Schlüssel zu den Gattungen findet sich Folgendes: 



Tribe I. Moraeae. Flowers stalked, usually more tban one to a spathe, 

 often fugitive and opening one after the other. Style-branches placed opposite 

 the stameus and the outer segments of the perianth. 



* Style-branches furnished with erects that overtop the anthers and 

 transversa stigms. 

 t Inner-segments of the perianth not couvolute. fTemperate 

 regions.j 



1. Iris L. Perianth usually with a tube above the ovary. Filaments free. 

 Ovary 3 celled. Kootstock usually a rhizome, in § Xiphion a bulb. 



North temporate zone. 161 Species. 



2. Hermodactylus (Tourn.) Adans. Like Iris, but ovary 1 celled, with 

 3 parietal placentas and rootstock digitate. Mediterranean region. 1 Species. 



3. Moraea L. Perianth witbout a tube. Filaments monodelphous. Ovary 

 3 celled. Rootstock except in § Dietes a tunicated corm. 



Cape, Tropical Africa, Lord Howe's Island. 57 Species. 

 ff Inner segments of the perianth convolute. (Tropical.) 



4. Marlea Ker. Perianth witbout a tube. Style-erects petaloid. Leaves 

 in a distichous rosette, not plicata. Peduncle flattened. Rootstock not bulbous. 



Tropical America. 11 Species. 



5. C'ypella Herb. Perianth witbout a tube. Style-erects large, spur-like 

 or flattered. Sterns terete. Leaves superposed, plicate. Rootstock bulbous. 



Tropical America. 8 Species. 



6. Trimezia (Salisb.) Herb. Perianth witbout a tube. Style-erects small 

 tubercles or cusps. Sterns terete. Leaves not plicate. Rootstock bulbous. 



Tropical America. 4 Species. 

 ** Style-branches furnished with terminal Stigmas, not overtopping 

 the authers. 



7. Tigrida Juss. Perianth-segments connivent in a cup, then spreading. 

 Style-branches-bifid ; forks subulate. Tropical America. 8 Species. 



8. Hydrotaenia Lindley. Like Tigridia, but perianth-segments witbout 

 any spreading blade. Tropical America. 4 Species. 



9. Rigidella Lindl. Perianth-segments connivent in a cup, inner very 

 emall; outer with a large reflexed blade- Style-branches bifid, forks subulate. 



Mexico and Guatemala. 2 Species. 



10. Herhertia Sweet. Periauth-tube none; inner-segments small, not 

 convolute. Style-branches biüd at the tip. 



Texas and subtemperate South America. 7 Species. 



