82 THE CACTACEAE. 



Figure 119 is from a photograph taken by Frank E. Lutz at Enscnada, near Guanica, 

 Porto Rico, in 1915; figure 120 shows a fruit collected by Dr. Britton and Dr. Shafer at 

 Guanica in 1913; figure 121 shows a flower from a plant at the same locality. 



PUBLISHED SPECIES, PERHAPS OF LEPTOCEREUS. 



CKKEUS PANICULATUS De Candolle, Prodr. 3: 466. 1828. 

 Cm Ins [Hinh ulatus Lumarck, Encyl. i: 540. 1783. 



This has long been in doubt and is known only from imperfect description and illus- 

 tration. Lamarck states that it is from Santo Domingo, in a region called cul-de-sac, and 

 is based on Burmann's plate 192 of Plumier. It is apparently a Lcplocereus, perhaps L. 



u'cingartianns. 



11. EULYCHNIA Philippi, Fl. Atac. 23. 1860. 



Stout, erect or procumbent and ascending, green cacti, usually with many branches, the 

 branches parallel-ribbed, armed with spines; perianth white to pinkish, withering and persisting 

 on the ovary; flowers single at the areoles, opening during both day and night, short and broad for 

 the group, with an open throat, the tube very short if not wanting altogether; scales on ovary and 

 flower-tube numerous, their axils usually with bristles or long hairs; filaments very short, covering 

 the face of the throat; style short and thick; fruit globular, fleshy, somewhat acid, hardly edible; 

 seeds small, dull black, containing endosperm (according to Mr. Sohrens). 



Type species: Eulychnia bremfiora Philippi. 



This genus as here defined contains 4 species found along the coast and central valleys 

 of the provinces of Aconcagua, Coquimbo, Atacama, Antofagasta, and Tarapaca, Chile. 



To this group, treated as a subgenus of Cereus by Mr. Berger, has been referred a num- 

 ber of anomalous species which we place elsewhere; they are similar to this genus in the 

 fact that they have very short flower-tubes, but in habit, fruit, and other characters they 

 are quitedistinct. These speciesjwill be discussed in this work under other genera . 



The genus Eulychnia was first established in 1860 by Rudolph Philippi, who based it 

 upon a single species, E. breviflora. In 1864 two other species, E. acida and E. castanea, 

 were described, while the fourth is transferred by us from Cereus. 



The plants are usually found on dry hills, and are often associated with other cacti 

 and other desert plants. In many regions they form the dominant feature in the vegetation. 

 At least two species are commonly used for fuel, and one (E. acida) is used for hedge fences. 



The generic name is from the Greek, signifying a candlestick. 



KEY TO SPECIES. 



Areoles of the ovary and perianth-tube without stiff bristles. 

 Areoles of the ovary and perianth-tube with long wool. 



Wool chestnut-brown; areoles of the joints small, little felted i. E. spinibarbis 



Wool white; areoles of the joints large, approximate, densely felted 2. E. iquiquensis 



Areoles of the ovary and perianth-tube with very short wool 3. E. acida 



Areoles of the ovary and perianth-tube with stiff brownish bristles and short wool 4. E. castanea 



1. Eulychnia spinibarbis (Otto). 



Cereus spinibarbis Otto in Pfeiffer, Enum. Cact. 86. 1837. 



Ccrfiis panoplaeatus Monville, Hort. Univ. i: 220. 1840. 



l-'-nl \flin in breviflara Philippi, Fl. Atac. 24. 1860. 



Echinocereus spinibarbis Schumann, Monatsschr. Kakteenk. 5: 124. 1895. 



Cereus brei'iflorus Schumann, Gesamtb. Kakteen Nachtr. 23. 1903. 



Stems 2 to 4 meters high, much branched; branches 7.5 cm. in diameter; ribs 12 or 13; spines 

 about 20 from an areole, usually 18 mm. long, but the longest one at times 15 cm. long; flowers 3 

 to 5 cm. long; scales on ovary and flower small, bearing in their axils long brown wool; outer perianth- 

 segments short, acuminate; inner perianth-segments white to pinkish, oblong, 2 cm. long, acute; 

 style short, 1.5 cm. long including the stigma-lobes; scales on the ovary small, their axils filled 

 with long brown wool. 



7'v/v locality: Near Coquimbo, Chile. 



Distribution: Along the coast of the province of Coquimbo, Chile. 



