Table S1.
Sample details for Cucurbita accessions analyzed: archaeological samples
| Laboratory ID | Taxon | Site | Site no. | Accession no. | Tissue |
| 101 | C. pepo ssp. ovifera | Putnam Shelter, AR | 3WA4 | 32-44-291 | Rind |
| 102 | C. pepo ssp. ovifera | Salts Bluff, AR | 3BE18 | 33-12-125 | Rind |
| 103 | C. pepo ssp. ovifera | 23BYM4, MO | 23BYM4 | 32-34-107 | Rind |
| 104 | C. pepo ssp. ovifera | Craddock Shelter, AR | 3CW2 | 34-7-130 | Rind |
| 105 | C. pepo ssp. ovifera | Cob Cave, AR | 3NW6 | 31-72-25 | Rind |
| 106 | C. argyrosperma | Eden's Bluff, AR | 3BE6 | 31-72-25 | Rind |
| 107 | Cucurbita sp. | Salts Cave, KY | 15HT4 | CRF-81 | Rind |
| 108 | Cucurbita sp. | Salts Cave, KY | 15HT4 | CRF-85 | Rind |
| 109 | Cucurbita sp. | Salts Cave, KY | 15HT4 | CRF-95 | Rind |
| 110 | C. pepo ssp. ovifera | Phillips Spring, MO | 23HI216 | 1502 seed 8 | Seed |
| 111 | Cucurbita sp. | Phillips Spring, MO | 23HI216 | 1502 seed 13 | Seed |
| 112 | C. argyrosperma | Coxcatlan Cave, Puebla, Mexico | TC50 | XI 39/5 | Rind |
| 113 | Cucurbita sp. | Coxcatlan Cave, Puebla, Mexico | TC50 | XI 79/6 | Rind |
| 114 | C. argyrosperma | Coxcatlan Cave, Puebla, Mexico | TC50 | VII 70/8 | Rind |
| 115 | C. argyrosperma | Coxcatlan Cave, Puebla, Mexico | TC50 | V 37-4 | Rind |
| 116 | Cucurbita sp. | Romero's Cave, Tamaulipas, Mexico | TMC247 | occ 2 247/14 | Rind |
| 118 | Cucurbita sp. | Romero's Cave, Tamaulipas, Mexico | TMC247 | occ 5 247/72 | Rind |
| 119 | Cucurbita sp. | Romero's Cave, Tamaulipas, Mexico | TMC247 | occ 10 247 32 | Rind |
| 120 | Cucurbita sp. | Romero's Cave, Tamaulipas, Mexico | TMC247 | occ 11 247/93 | Rind |
| 121 | C. pepo ssp. pepo | Romero's Cave, Tamaulipas, Mexico | TMC247 | occ 14 247/243 | Rind |
| 122 | C. moschata | Romero's Cave, Tamaulipas, Mexico | TMC247 | occ 16 51/16 | Rind |
| 123 | C. pepo ssp. fraterna | Romero's Cave, Tamaulipas, Mexico | TMC247 | occ 8 247/89 | Rind |
| 139 | C. pepo ssp. pepo | Guila Naquitz, Oaxaca, Mexico | OC43 | INAH42(6N18) Zona B1 Cuadro C11 | Rind |
| 140 | C. pepo ssp. pepo | Guila Naquitz, Oaxaca, Mexico | OC43 | INAH58(6N20) Zona B(B1) Cuadro B9 | Rind |
| 141 | Cucurbita sp. | Jemez Cave, NM | 759 Lab 16801 | Rind | |
| 142 | C. pepo ssp. pepo | El Riego Cave, Puebla, Mexico | TC50 | Square16(S3E3) Level 3 Peduncle 21 | Peduncle |
| 143 | Cucurbita sp. | Newt Kash Hollow, KY | 15MF1 | 10842 Lab 16390 | Rind |
| 144 | C. pepo ssp. pepo | Bandelier Cave, NM | 2143 B | Rind | |
| 145 | Cucurbita sp. | Cloudsplitter Rockshelter, KY | 15MF36 | FS1580 ES8145 | Rind |
| 146 | C. pepo ssp. pepo | Jemez Cave, NM | 969 Lab 16291 | Seed | |
| 147 | Cucurbita sp. | Mammoth Cave, KY | 15ED1 | 87276 B16 Wartly | Rind |
| 148 | C. pepo ssp. pepo | Bat Cave, NM | LA44182 Bag 2144 SV45A | Rind |