Gladiolus Studies — I 



99 



Subgenus Eugladiolus. — Perianth-tube funnel-shaped; segments not distinctly 

 unguiculate. 



Species of Europe and Western Asia. 



Seeds flat, winged Sp. 1-5. 



Seeds globose Sp. 6-8. 



Seeds unknown Sp. 9-15. 



Species of the Cape and Tropical Africa. 

 Leaves subterete or linear. 



Perianth-segments acute Sp. 16-31. 



Perianth-segments obtuse Sp. 32-72. 



Leaves ensiform Sp. 73-109. 



Subgenus H. Hebea. — Perianth-tube short; segments distinctly tmguiculate. 

 Spathes large Sp. 110-124. 



Subgenus IIL Schwhiggera. — Flowers small; segments distinctly unguiculate. 

 Spathes small Sp. 123-126. 



Subgenus IV. Homoglossum. — Perianth-tube like that of a Watsonia; segments 

 subequal Sp. 127-132. 



The following key to eighty-one of the Cape species appears in Flora 

 Capensis (Baker, 1896-97). The European, Asiatic, and central African 

 species are of course not included. 



Subgenus L Eugladiolus. Spathe-valves large, green, 

 lanceolate; perianth-segments not distinctly unguiculate. 



A. Leaves terete or linear: 



Perianth-segments acute: 

 Perianth-tube 1 5-2 in. long: 

 Leaves subterete: 



Perianth-segments long and gradually pointed . (i) grandis. 

 Perianth-segments shortly pointed: 



Perianth pale or slightly flushed with dark 



lilac (2) tristis. 



Perianth dark lilac (3) recur\-us. 



Leaves linear: 



Segments with a short cusp (4) angustus. 



Segments with a long cusp (5) cuspidatus. 



Perianth-tube about an inch long: 

 Leaves subterete: 

 Flowers horizontal: 



Flowers pink (6) hastatus. 



Flowers blue-lilac (7) gracilis. 



Flowers yellowish (8) tenellus. 



Flowers suberect (9) trichonemifolius. 



Leaves linear: 



Flowers lilac (10) vomerculus. 



Flowers yellowish (l l) strictus. 



Whole flower not above an inch long: 



Leaf with scarcely any free point (12) pubescens. 



Leaf slender, subterete (13) Lambda. 



Leaf linear, long (14) rachidiflorus. 



Perianth-segments obtuse or obscurely cuspidate: 

 '■ Stem-leaves with only verv' short, free points: 

 Sheaths glabrous: 



Flowers pink or lilac: 



Perianth-tube half as long as the segments. . (15) microphyllus. 



Perianth-tube as long as the segments (16) bre\nfolius. 



Perianth-tube longer than the segments (17) tabularis. 



Flower-segments white with a red keel (18) inandensis 



Sheaths pilose (19) Woodii. 



