XIV ILLUSTRATIONS. 
Facing page. 
Puate XLII. Abronia fendlert Standley..............-.--------2-2--------- 324 
XLIV. Thompsonella minutiflora (Rose) Britton & Rose.....2.....-.-. 392 
XLV. Thompsonella platyphylla Rose... 2... 022.0000 ee eee eee 392 
XLVI. Echeveria carnicolor Baker.............5.-.-. 20000000222 ee 393 
XLVI. Echeverta guatemalensis Rose..........22.2.--2-0--20-2--222+--- 395 
XLVIII. Eeheveria maxonii Rose......... 2.222222 eee eee ee 395 
XLIX. Cereus nudiflorus Engelm..........-0.2.000-25202000 0022022 398 
L. Cereus nudiflorus Engelm......0000000000000002000000-002---- 398 
Ll. Fruit of Cereus nudiflorus Engelm...............0.0...-.----- 398 
LII. Pereskia autumnalis (Fichlam) Rose...........020-2.0222-.-.-- .399 
LUI. Pereskia autumnalis (Fichlam) Rose............-.--.-.-------- 399 
LIV. Fruiting branches of Pereskia autumnalis (Kichlam) Rose... ... 399 
LV. A joint of Opuntia blakeana Rose. ........2.2.0.0500-0520-22--- 402 
LVI. Echinocereus baileyi Rose. .... 2.2.2.2 2.2 eee ee ee 403 
LVI. Flower of Echinocereus baileyi Rose...........-..05.02.-2----- 403 
LVILI. Nopalea lutea Rose... 2.2.0.2. 2. eee 405 
LIX. Conzattia arborea Rose....... 2-2... 002200 408 
LX. Asplenium microtum Maxon............-.2...222222222222--- 411 
LXI. Cereus jamacaru (L.) Mill......2..22.2222-0-0-.-------------- 414 
LXII. Cephalocereus colombianus Rose... 2... 2.222022 2 eee ee eee 416 
LXIII. Cephalocereus colombianus Rose... 2.222.002 2222 416 
LXIV. Cephalocereus maronii Rose... 2.6 ee 417 
LXY. Hscontria chiotilla (Weber) Rose........00.200022022222..-2---. 420 
LXVI. Pachycereus chrysomallus (Lem.) Britton & Rose.........0...-. 421 
LXVII. Lemaitreocereus griseus (Haw.) Britton & Rose........2......-. 425 
LXVIII. Lemaireocereus mixtecensis (Purpus) Britton & Rose............ 4125 
LXIX. Lemaircocereus stellatus (Pfeiff.) Britton & Rose...........2.-. 426 
LXX. Lemaireocereus treleasei Rose... 2.2. ....22000000000 000.02 ee 426 
LXXI. Lematreocereus weberi (Coult.) Britton & Rose... .......2...-. 426 
LXXII. Myrtillocactus geometrizans (Mart.) Console............2.0..... 427 
UXXIIL. Myrtillocactus schenckii (Purpus) Britton & Rose.......... 2... 427 
LXAXIV: Peniocereus greggii(Engelm.) Britton & Rose.....22.2 02.2... -. 128 
LXXV. Peniocereus greggit (Engelm.) Britton & Rose.......2........-. 428 
LXXVI. Selenicereus macdonaldiae (Hook.) Britton & Rose. ............ 430 
LXXVIIL. Echeveria bifurcata Rose..... 22.2.2... 2-02 ee eee 439 
LXNXVIIL. Echeveria trianthinus Rose... ...........22..-2-02-----2-2---- 439 
LXXIX, Sedum allantoides Rose... ............0-0-0-0 002020 eee 440 
LXXX. Sedum compressum Rose. ........-..---2--------2----- 2-22 440 
LXAXXI, Villadia levis Rose... 2.22.2... 222 eee 440 
LXNXXII. Ligusticella eastwoodae C. & R22... 222222 ee 445 
LXXXIII. Pseudocymopterus tidestromii C. & Revi... 2. ee ee 447 
LXXXIV. Young plants and spikelets of apogamous maize. .......2..... 454 
LXXXYV. Branch of tassel of apogamous maize...-.-. 2.2.2.2. ee eee 454 
TEXT FIGURES. 
Page. 
Fic. 1. Fruit of Eschweilera collinsii. Longitudinal section. ................. 98 
2. Stamens of Couroupita nicaraquarensis.............-.-22-2-----22--2-- 98 
. 3. Fruit of Lecythis costaricensis. Longitudinal section.................. 100 
4. Fruit of Lecythis costaricensis. Transverse section..................... 100 
5. Stamen, pistil, and seed of Tonduzia parvifolia........................ 108 
6. Fruit of Tonduzia parvifolia. ........0000. 00020020000 104 
7. Flowers of Sapium pletostachys ..........-.--2-22- 000000000020 ee 164 
