38 INTRODUCTION 
O. crispum, some examples, and other sp. of O. (Fr. Miiller). Sp. of Notylia, 
Burlingtonia, Rodriguezia, Gomeza, and (?) Stigmatostalix (Fr. Miiller). 
Bromeliaceae.—Billbergia speciosa Rzv. (Fr. Miiller). | 
Araceae.—Atherurus ternatus (Hunger). 
Liliaceae-—Lilium candidum (Tinzmann), L. croceum Chazx (Focke), L. bulbi- 
ferum (Focke, Neubert), L. canadense (Meehan). Hemerocallis flava, Dumortieri, 
and serotina (Focke), H. fulva (Sprengel, Maximowicz, Hoffmann). 
Amaryliidaceae.— Pancratium caribaeum (Eggers). Hippeastrum aulicum 
(Herbert), hybrid forms of Hippeastrum (Herbert). 
Iridaceae—Romulea Bulbocodium var. dioica Seb. e¢ Maur. (Battandier). 
Hybrid forms of Gladiolus (Rawson). Marica Northiana (Fr. Miiller). 
Gramineae.—Secale cereale(Rimpau, Liebenberg, Focke, Beijerinck). Saccharum 
officinarum Z., 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-fer tile. 
Ranunculus acris (Focke). R. auricomus (Focke). 
R. bulbosus? (Focke). R. arvensis (Focke). 
To these may be added the following Brazilian instances given by Fritz Miiller 
(Abh, natw. Ver., Bremen, xii, 1893, p. 495) :— 
Abutilon striatum Dicks. A. megapotamicum A. S#, H7i. e¢ Naud. 
A. venosum /Zook, 
A. Darwinii Hook, f- 
A. form hybr. 
Billbergia speciosa Rzv. Billbergia zebrina Zznd). 
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 Z. (Warming). Glaucium 
luteum (Hildebrand). Argemone ochroleuca (Darwin). Adlumia cirrhosa (Darwin). 
Hypecoum procumbens (Hildebrand). 
Fumariaceae—Fumaria officinalis (Darwin, Hoffmann), F. capreolata (Darwin). 
Corydalis 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). 
