38 INTRODUCTION 



O. crispum, some examples, and other sp. of O. (Fr. Miiller). Sp. of Notylia, 

 Burlingtonia, Rodriguezia, Gomeza, and (?) Stigmatostalix (Fr. Muller). 

 Bromeliaceae. Billbergia speciosa Riv. (Fr. Muller). 

 Araceae. Atherurus ternatus (Hunger). 



Liliaceae. Lilium candidum (Tinzmann), L. croceum Chaix (Focke), L. bulbi- 

 ferum (Focke, Neubert), L. canadense (Meehan). Hemerocallis flava, Dumortieri, 

 and serotina (Focke), H. fulva (Sprengel, Maximowicz, Hoffmann). 



Amaryllidaceae. Pancratium caribaeum (Eggers). Hippeastrum aulicum 

 (Herbert), hybrid forms of Hippeastrum (Herbert). 



Iridaceae. Romulea Bulbocodium var. dioica Seh. el Maur. (Battandier). 

 Hybrid forms of Gladiolus (Rawson). Marica Northiana (Fr. Miiller). 



Gramineae. Secale cereale(Rimpau, Liebenberg, Focke, Beijerinck). Saccharum 

 officinarum L., probably (Focke). 



Self-sterility is often associated with unusual powers of vegetative propagation. 

 In many cases related species behave differently with respect to their fertility or 

 infertility as regards their own pollen. For example : 

 Self-sterile. Self-fertile. 



Ranunculus acris (Focke). R. auricomus (Focke). 



R. bulbosus ? (Focke). R. arvensis (Focke). 



To these may be added the following Brazilian instances given by Fritz Muller 

 (Abh. natw. Ver., Bremen, xii, 1893, p. 495): 



Abutilon striatum Dicks. A. megapotamicum A. St. Hil. et Naud. 



A. venosum Hook. 

 A. Darwinii Hook.f. 

 A. form hybr. 



Billbergia speciosa Riv. Billbergia zebrina Lindl. 



Marica Northiana Ker. Marica sp. al. 



Cypella sp. 

 Trimeriza sp. 

 Hedychium coccineum Sm. H. coronarium Koem. 



Alpinia nutans Rose. Alpinia sp. 



A. sp. 



The following are Self-fertile, i.e. perfectly fruitful (or, at least, not greatly 

 weakened) in the absence of insects ^ : 



Ranunculaceae. Ranunculus acris (Darwin, but self-sterile according to Focke), 

 R. auricomus (Focke), R. arvensis (Focke). Adonis aestivalis (Hoffmann). 



Nymphaeaceae. Papaver somniferum (Darwin), P. dubium (Hoffmann), P. vagum 

 (Darwin), P. argemonoides (Hildebrand), P. nudicaule L. (Warming). Glaucium 

 luteum (Hildebrand). Argemone ochroleuca (Darwin). Adlumia cirrhosa (Darwin). 

 Hypecoum procumbens (Hildebrand). 



Fumariaceae. Fumaria officinalis (Darwin, Hoffmann), F. capreolata (Darwin). 

 CorydaUs ochroleuca (Kerner). 



1 In addition to the cases of self-fertility given here, many others have been described, especially 

 by Henslow, Meehan, Pedicino, and Wilson. It is impossible to enumerate them in this place 

 (cf. p. 23). 



