374 HORTUS MORTOLENSIS 
A. Ovary 3-celled; fruit wingless. Leaves serrulate-roughened. 
a. Fruit deeply 3-lobed, often inflated ; seeds nearly globose, 
fleshy walled. Pedicels articulated rather far below 
the flowers. . Nolina. 
b. Fruit globose- triangular, not lobed or inflated ; seed 
melon-shaped, thin walled. Pedicels articulated 
close to the flowers . ; . Calibanus. 
B. Ovary 1-celled; fruit 3-sided and 3- winged, not lobed or inflated. 
a. Pedicels articulated somewhat below the flowers. Peri- 
anth segments entire, acute. Leaves serrulately 
roughened on the margin. Inflorescence a panicle. Beaucarnea. 
b. Pedicels articulated close to the flowers. Perianth 
segments denticulated, rather obtuse. Leaves on 
the margin (except the square-leaved species D. 
longissimum Lem. = D. quadrangulatum Wats.) 
armed with strong prickles and usually also serru- 
lately roughened. Inflorescence a stout compound 
spike ; - : : : ; : : . Dasylirion. 
Beaucarneas are stately arborescent plants with a stem more 
or less swollen at the base. Of B. gracilis seeds and seedlings 
were received from Mr. Purpus, of Darmstadt Botanic Garden, from 
the Dendrol. Ges. Vienna, and from Dr. Rose, of Washington. 
The largest specimen of B. recwrvata is now 3:50 m. high, has 
six branches and a stem of 2:55 m. circumference at the base. It 
was bought from Prince Troubetzkoy’s garden in July, 1888. 
BrEscHORNEBRIA. 
Beschornerias are very decorative plants. The species are 
closely allied, some of them probably but forms of B. yuccoides.* 
B. yuccoides was first bought by Mr. Daniel Hanbury from M. 
van Geert, in Ghent, in August, 1872. B. argyrophylla was re- 
ceived from Mr. Geoffroy St. Hilaire, Gros Pin, Hyéres, in March, 
1902. <A yet unnamed plant was kindly sent by Dr. J. N. Rose, of 
the United States National Museum at Washington, in November, 
1906. It was collected by him and Dr. Pringle (n. 19259) in the 
valley of Mexico at an elevation of 10,000 feet. 
BIGNONIA. 
I keep this old genus partly in the sense of De Candolle, but 
have followed more recent monographers, where it was possible 
to do so. Schumann’s arrangement in N. Pf. iv. 30. is difficult to 
follow, as it is impossible to place well-known garden plants, if 
fruits are wanting. 
B. Tweediana is a rampant climber, easily covering walls and 
rocks, flowering and fruiting abundantly. Mr. D. Hanbury received 
it from Prof. Decaisne, of the Jardin des Plantes, in Paris. 
BILLBERGIA. 
A good many species are quite hardy and free flowering ; some 
do well as epiphytes on trees. The hybrid B. Leopoldi x Moreli 
was raised thirty years ago by Dr. Attilio Ragionieri, of Castello, 
* See my note in Gardeners’ Chronicle, 1906, ii. p. 350. 
