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 191 5. 



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 pcntlandii 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 i. L. bruckii 



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 2. L. ferox 



Tubercles 1 to 2 cm. long or less, not over 1 cm. high ; spines slender, nearly straight. 



Tubercles narrow, acute; spines subulate 3. L. longispina 



Tubercles broad, blunt; spines acicular 4. L. boliviensis 



BB. Ribs up to 19, but usually fewer. 



Flowers yellow 5. L. shaferi 



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. 6. L. cachensis 

 Central spine solitary, never hooked; radial spines 1 to 2 cm. long, brownish. 7. L. caespitosa 



Spines straight 8. L. saltensis 



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 9- L. cinnabarina 



Spines yellowish brown, elongated 10. L. penllatidii 



Flower-areoles long-hairy; tubercles short, blunt 11. L. later itia 



Inner perianth-segments narrow. 



Flowers 5.5 to 6 cm. long, white-hairy 12. L. pampana 



Flowers small, 3 cm. long, black-hairy 13. L. corbula 



Ribs not strongly undulate, at least never tubercled. 

 Flowers 6 cm. long or less. 



Central spine 1 to 2.5 cm. long 14. L. andalgalensis 



Central spines up to 5 cm. long 15. L. haematantha 



Flowers 10 cm. long 16. L. grandiflom 



AA. Base of flower-tube with ring of hairs on inside; scales on outside of flower reflexed at 

 apex. 



Flowers yellow 17- L. thionanthus 



Flowers white 18. L. chionanthus 



AAA. Species not grouped j^o! L. cumingii 



