LOBIVIA. 49 
This species was named for Dr. Philip Silvestri, a friend of Dr. Spegazzini. 
Illustrations: Curtis’s Bot. Mag. 138: pl. 8426; Gartenwelt 15: 484; Haage and 
Schmidt, Haupt-Verz. 1919: 167, as Cereus silvestrii. 
Figure 61 is from a photograph contributed by Dr. Spegazzini in 1915. 
a 
\ G a\ 5. LOBIVIA gen. nov. 
Plant globular to short-cylindric, either simple or in clusters, always ribbed, usually very spiny; 
flowers so far as known diurnal, short-funnelform to campanulate, lateral from old areoles, in some 
from near the top, in others well down on the side of the plant, with a short, broad tube, red in typical 
species, but in others yellow or white; scales on the ovary mostly bearing long hairs in their axils; 
fruit small, globular. 
Type species: Echinocactus pentlandii Hooker. 
The genus as here treated is composed of 20 species, mostly hitherto referred to 
Echinopsis and Echinocactus. It is made to include various anomalous species which 
can not properly be referred to any described genus, and it is questionable whether they 
are all congeneric. Some, however, we know only from descriptions or photographs 
and further knowledge of them may lead to a different arrangement. In form their 
flowers are much alike. The two species transferred from Echinocactus (E. thionanthus 
and EF. chionanthus) are described as having a dense ring of hairs on the inside of the 
flower-tube below the stamens; this with other differences in the shape of the flower may 
be of generic value. The species all inhabit the highlands of Peru, Bolivia, and Argentina. 
The generic name is an anagram of Bolivia. 
KEy TO SPECIES. 
A. Base of flower-tube naked within. 
B. Ribs 20 to 50 or more. .. 
Plant somewhat depressed; spines not long........-. 0. cece cece cece eee ee eees 1. L. bruchii 
Plant globose to cylindric; spines very long. 
Tubercles very large, 2 to 3 cm. long, 1 to1.5 cm. high; central spines upwardly 
CUrved. 2... ee ee ee ee ee eee ae beeen e eee ees bees 
Tubercles 1 to 2 cm. long or less, not over 1 cm. high; spines slender, nearly straight. 
Tubercles narrow, acute; spines subulate....... 6.2.2... 0 eee ee ee eee ee ee eee 
Tubercles broad, blunt; spines acicular............- 0.6 c eee eee eee ee ee eee 4s 
BB. Ribs up to 19, but usually fewer. 
Flowers yellow... ..........-.2 cece eee eee eens cece e eee ee cece ee ee tees 5. 
Flowers reddish. 
Scales on flower-tube few. 
Spines curved or somewhat hooked. 
. ferox 
L 
3. L. longispina 
L. boliviensis 
L 
. shaferi 
i i i ish. 6. L. cachensis 
Central spines 4, some hooked; radial spines weak, 4 to 5 mm. long, yellowish. n 
Central spine itary, never hooked; radial spines 1 to 2 cm. long, brownish. 7. fr. caespitosa 
Spines straight... 0... 0.6.0. cee cece eee ee ce eee teen ener t eee re ees Ls 
Scales on flower-tube numerous. — _ 
Ribs strongly undulate or broken into narrow tubercles. 
Inner perianth-segments broad. 
Flower-areoles short betty: tubercles long, acute. 9. L. cinnabarina 
Spines grayish, short. .........-- 0022s cere eee tee terete ees DL. im 
Spines yellowish brown, elongated......-...-.-- +++ +e essere eres 10. t. penilandti 
Flower-areoles long-hairy; tubercles short, blunt............-.------++ Ind. 
Inner perianth-segments narrow. ; 
Flowers 5.5 to 6 cm. long, white-hairy......-.... +--+ +25 eee seer eres 1 L. pampana 
Flowers small, 3 cm. long, black-hairy...........---- . iL. 
Ribs not strongly undulate, at least never tubercled. 
Flowers 6 cm. long or less. 14. L. andalgalensis 
Central spine 1 to 2.5 cm. long. .....--.- 262 reer creer eee tees 4 Donec 
Central spines up to gem. long. .------- srr 15: Feeder 
Flowers 10 cm. long.......--- +2 0:0 sree secs ce tty settee cscs ] 
AA. Base of flower-tube with ring of hairs oninside; scales on outside of flower reflexed at 
Nee teeter. ook Fane cn vn comdcderceeececoscetecessccsecssrs 17. L. thionanthus 
Flowers yellow. .....-.---+++seerstcrercrete cenerenesossscnenss sss 13. L. chionanthus 
Flowers white.......... ++ sess eeceee le eeeees (1. grandis 
AAA. Species not grouped. ..........eceeceee eee sete reer rnse sess en seer sree cesses 20. L. cumingit 
