LOBIVIA. 
49 
This species was named for Dr. Philip Silvestri, a friend of Dr. Spegazzini. 
Illustrations: Curtis’s Bot. Mag. 138: pi. 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. 
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 E. 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. 
Plant globose to cylindric; spines very long. 
Tubercles very large, 2 to 3 cm. long, 1 to 1.5 cm. high; central spines upwardly 
curved. 
Tubercles 1 to 2 cm. long or less, not over 1 cm. high; spines slender, nearly straight. 
Tubercles narrow, acute; spines subulate. 
Tubercles broad, blunt; spines acicular. 
BB. Ribs up to 19, but usually fewer. 
Flowers yellow. 
Flowers reddish. 
Scales on flower-tube few. 
Spines curved or somewhat hooked. 
Central spines 4, some hooked; radial spines weak, 4 to 5 mm. long, yellowish. 
Central spine solitary, never hooked; radial spines 1 to 2 cm. long, brownish. 
Spines straight. 
Scales on flower-tube numerous. 
Ribs strongly undulate or broken into narrow tubercles. 
Inner perianth-segments broad. 
Flower-areoles short-hairy; tubercles long, acute. 
Spines grayish, short. 
Spines yellowish brown, elongated. 
Flower-areoles long-hairy; tubercles short, blunt. 
Inner perianth-segments narrow. 
Flowers 5.5 to 6 cm. long, white-hairy. 
Flowers small, 3 cm. long, black-hairy. 
Ribs not strongly undulate, at least never tubercled. 
Flowers 6 cm. long or less. 
Central spine 1 to 2.5 cm. long. 
Central spines up to 5 cm. long. 
Flowers 10 cm. long. 
AA. Base of flower-tube with ring of hairs on inside; scales on outside of flower reflexed at 
apex. 
Flowers yellow. 
Flowers white.. 
AAA. Species not grouped.< 
1. L. bruchii 
2. L. ferox 
3. L. longispina 
4. L. boliviensis 
5. L. shaferi 
6. L. cachensis 
7. L. caespitosa 
8. L. saltensis 
9. L. cinnabarina 
10. L. petitlandii 
11. L. lateritia 
12. L. pampana 
13. L. corbula 
14. L. andalgalensis 
15. L. haematantha 
16. L. grandiflora 
17. L. thionanthus 
18. L. chionanthus 
19. L. grandis 
20. L. cumingii 
