408 REPORT OF THE CONFERENCE ON GENETICS. 
Hybrid No. 3.—Raised at Boston. 
Hybrid No. 5.—This is fairly equipoised between either parent. Of 
the eight divergent characters, the hybrid was nearest the female in four, 
nearest the male in one, and intermediate in three. There was no absolute 
“dominance ’’ in any character excepting the colour of the stigma. Sixty- 
five individuals were thus generally equipoised, and two were indistinguish- 
able from the female parent (see Table I.). Some of these (individuals) 
were indistinguishable from the ‘ Isabel Watson’ raised at Kew. 
Hybrid No. 6 is also equipoised, and without any instance of absolute 
dominance. In the eight divergent characters, the hybrid was nearest the 
male in three, nearest the female in one, and intermediate in four (see 
Table II.). The flowers of this hybrid are larger than either parent, and 
are hence easily distinguishable from those of hybrid No. 5. 
Hybrid No. 7 is said by Monsieur de Laet to have produced the most 
beautiful colours, to some of which such names as ‘Conway Giant’ have 
been given. 
Hybrids Nos. 10-14 were all raised out of C. speciosissimus [C. 
speciosus, Schumann}, which is three-, four-, or (generally) five-angled, and 
carries smallish but widely expanded red flowers, flushed with magenta. 
From the results of crosses with this species have originated most (if not 
all) of those garden Cacti which are flushed with magenta; ‘Isabel 
Watson’ is the most beautiful example of this class. P. Ackermanni 
(as male) produced plants with three or four angles, but which became 
ultimately (in the flowering growths?) two-sided and unarmed, and 
Laboret said that for this reason he classed Cereus x Phyllocactus hybrids 
under Phyllocactus. C. flagelliformis (as male) is said by Laboret not 
only to have produced the C. Mallisoni (“ Bot. Mag.” 8822), but five 
other (presumably distinct) hybrid Cerei which were all more or less 
like the parents, and those which he had seen (in flower ?) had the 
metallic flush of the female. 
Hybrids Nos. 15-18 were all raised out of C. grandiflorus—one of the 
so-called “rat-tailed’’ section, which generally (as in the case of this 
species) carry very large and beautiful, but ephemeral and night-opening, 
flowers. Those of grandiflorus are white and fragrant. C. speciosissimus 
(as male) produced the five-angled hybrid Haaget, and also C. Maynardu 
(Lem.), whose bright red flowers remain open several days. But besides 
these, Laboret lists seven (other) hybrids as resulting from this same 
cross! Hybrid No. 18 was brought from the Antilles, and is said to 
have been raised by C. affinis (Salm.). It is seven-angled, and Laboret 
suggested that it may be a distinct species. 
Hybrid No. 19.—I have only seen the flowers in a partly faded state, 
but the growths are very far removed from those of C. grandiflorus. 
Alleged Hybrids and other Crosses. Good Species, &c. 
Phyllocactus crenatus is said to have been crossed with an Hpiphyllum, 
by Mrs. Hovey, of Boston, about 1870. 
Mr. Peacock raised a number of cross-bred plants, and is said to have 
raised “hybrids” on P. crenatus. 
Monsieur de Laet has used P. Ackermanni, crenatus, and phyllan- 
thoides in hybridising, and has ascertained by analysis of seedlings that 
