ggi Cfictaceae. 89 



spineless but soon developing a Cluster of spines; fruit globular to 

 oval, beset with deciduous spines, in most species, at least, irregulary 

 bursting when old, exposing the seeds, often edible; seeds many, black. 



Lemaireocereus Cumengei (Weber) Britton and Rose 1. c. p. 424 (= Cereus Cumengei 

 Weber). — Lower California. 



L- Dumortieri (Salm-Dyck) Britton and Rose i. c. p. 425 {= Cereus Dumortieri 

 Salm-Dyck = ? Cereus anisacanfhus DG.). — Mexiko. 



L. eruca (Brandegee) Britton and Rose 1. c. p. 425 (= Cereus ernca Brandegee). 

 Lower California. 



L- griseus (Haw.) Britton and Rose 1. c. p. 425, PI. LXVII (= Cereus griseus Haw. 

 = C- eburneus Salm-Dyck = Echinocadus pruinosus Otto = Cereus clava- 

 tus Otto et Dietr. = C. laevigatus Salm-Dyck). — South America, Mexico, 

 Venezuela. 



L. gummosus (Engelm.) Britton and Rose 1. c. p. 425 (= C- gtmimosus Engelm.). 



— Lower California. 



L- Ttijstrix (Salm-Dyck) Britton and Rose 1. c. p. 425 (= Cactus hystrix Salm- 

 Dyck = Cereus hystrix Salm-Dyck). — Jamaica, Haiti, Cuba. 



L. Hollianus (Weber) Britton and R.ose 1. c. p. 425 (= Cereus Rollianus Weber 

 = C. bavosus Weber). — Mexiko. 



L. mixtecensis (Purpus) Britton and Rose 1. c. p. 425. pl. LXVIII (= Cereus 

 mixtecensis Purpus). — ibid. 



L. Schumanni (Mathsson) Britton and Rose 1. c. p. 425 (= Cereus Schumanni 

 Mathsson). — Honduras. 



L. stellatus CPieiii.) Britton and Rose 1. c. p. 426. pl. LXIX (= Cereus stellatus 

 Pfeiff. = C- Dyckii Mart. = C. tonellianus Lem.). — Zentral-Mexiko. 



L. Thurberi (Engelm.) Britton and Rose 1. c. p. 426 (= Cereus Thurberi Engelm.). 

 Lower California. 



L Treleasei Rose 1. c. p. 426. PI. LXX. — Oaxaca (Rose n. 11300). 



L. Weberi (Ooult.) Britton and Rose 1. c. p. 426. PI. LXXI (= Cereus Weberi 

 Coult. = C. candelabrum Weber). — Mexiko. 



Leptocereas Britton and Rose gen. nov. in Contrib. U. S. National Herb. 

 Washington XII (1909). p. 433. 



Stems diffusely branching; branches slender, usually with 6 pro- 

 minent thin ribs, so far as known not giving off roots; spines slender, 

 similar; flowers diurnal (?), small; calyx tube short; stamens and stjde 

 included; ovary and fruit very spiny. 



L. assurgens (Criseb.) Britton and Rose 1. c. p. 433 (= Cereus assurgens Criseb.). 



— Western Cuba. 



Lophocerens Britton and Rose gen. nov. in Contrib. ü. S. Nat. Herb. Washington 

 XII (1909). p. 426. 



Plauts either simple or with a few branches, or much branched 

 at base; ribs few, areoles on the lower part of stem very different from 

 the Upper ones; flowering areoles (in the wild State) developing long brictle- 

 like hairs standing out at right angles to the axis of the stem; flowers se- 

 veral from each areole, small (4 cm or less long), funnelform with a narrow 

 short tube ; petals red ; stamens short, included : fruit small, red, globular, 

 less than 2 cm. in diameter, glabrous or with a few spines in the axils 

 of small bracts; seeds numerous, small, black, shining, with a basal 

 depressed hilum. 



