Haworthia. ] LILIACEZ (Baker). 839 
green, nearly flat on the face, rounded on the back, with a faint 
eccentric keel, scabrous on the margin, rough all over with large irregu- 
lar raised papille tinged white at the tip ; peduncle branched, 14-2 ft. 
long including the inflorescence ; racemes very lax, } ft. long ; pedicels 
3-4 in, long; bracts small, ovate; perianth $ in. long; limb 2 as long 
as the tube. Baker in Journ. Linn. Soc. xviii. 203. Aloe hybrida, 
Salm-Dyck, Cat. 7; Aloe, sect. iv. fig. 4; Kunth, Enum. iv. 499. 
Soutn Arrica: without locality, living cultivated plants ! 
First described from the collection of the Emperor Francis I., at Vienna, in 
1814. It was received at Kew from Prince Salm-Dyck and drawn in 1822. May 
be a garden hybrid between H. rigida and H. Radula. 
13. H. rigida (Haw. Revis. 49); leafy stem 3~4 in. long, 2-3 in. 
diam., leaves included; leaves dense, multifarious, ovate-lanceolate, re- 
curved, 13-2 in. long, §—3 in. broad, ? in. thick, flat or slightly concave 
on the face, rounded on the back, with 1-2 faint eccentric keels, very 
dull green, red-brown when old, scabrous all over with minute con- 
colorous papille ; peduncle 3-1 ft. long, simple or branched ; racemes 
lax, } ft. long; pedicels 31 in. long; bracts minute, deltoid; perianth 
in. long; limb half as long as the tube. Baker in Journ. Linn, 
Soc. xviii. 203. Aloe rigida, DC. Plantes Grasses, t.62; Roem. et 
Schultes, Syst. Veg. vii. 655 ; Salm-Dyck, Aloe, sect. iv. Jig. 3; Kunth, 
Enum. iv. 499. A. cylindracea, var. rigida, Lam. Encye. i. 89. 
Var, ° 5 z ; leaves less scabrous. Aloe expansa, Haw . 
in lag paca met iri Tedd. Wek COMt. 1400, Ales: pigtta tecouse. 
Salm-Dyck, Aloe, sect. iv. fig. 3 8. Apicra patula, Willd, in Ges. Naturf. Fr. 
Berl. Mag. v. 272, excl. syn. 
Sours AFrica: without locality, living cultivated plants ! 
Introduced into cultivation about 1795. 
14, H. nigra (Baker in Journ. Linn. Soe. xviii. 208) ; leafy stem 
about } ft. long, 3 in. diam., leaves included ; leaves multifarious, 
ovate-lanceolate, acuminate, recurved, 1}-2 in. long, {-1 in. broad, 
4-4 in. thick, concave on the face, rounded and obliquely keeled on 
the back, blackish-green, unspotted, rough, with small crowded con- 
colorous tubercles; peduncle simple, } ft. long; raceme lax, simple, 
2 ft. long; pedicels y,—} in. long; bracts minute, deltoid; perianth 
in. long; limb half as longas the tube, Apiera nigra, Haw. in Phil. 
Mag. 1824, 302. Aloe nigra, Roem. et Schultes, Syst. Veg. vil. 
657 ; Kunth, Enum. iv. 495. 
SourH A¥Rica: without locality, living cultivated plants ! 
Introduced into cultivation by Bowie about 1822. 
15. H. glauca (Baker in Journ. Linn. Soc. xviii. 203); leafy 
stem 2-3 g ae 1-14 in. diam., leaves included ; leaves multi- 
farious, crowded, all ascending, oblong-lenceolate i sort Jong, 
+~3 in. broad, 2 in. thick, pale green when young, 
old, eens A dered flat on the face, and concolorous, rounded — 
the back, with a central keel down the upper half and 5-7 in 
tinct vertical ribs of darker green ; pedunele simple, } ft. long; 
