Here’s a summary of medical cannabis possession laws in various states across the USA:

1. Alabama: Medical cannabis is legal, but recreational use is not. Patients can possess cannabis as prescribed by a licensed physician.
2. Alaska: Both medical and recreational cannabis are legal. Patients can possess up to 1 ounce (28 grams) of cannabis.
3. Arizona: Medical and recreational cannabis are legal. Patients can possess up to 2.5 ounces of cannabis every two weeks.
4. Arkansas: Medical cannabis is legal, but recreational use is not. Patients can possess up to 2.5 ounces of cannabis every 14 days.
5. California: Both medical and recreational cannabis are legal. Medical patients can possess amounts consistent with their medical needs.
6. Colorado: Both medical and recreational cannabis are legal. Medical patients can possess up to 2 ounces of cannabis.
7. Connecticut: Both medical and recreational cannabis are legal. Medical patients can possess up to 3 ounces of cannabis per month.
8. Delaware: Both medical and recreational cannabis are legal. Medical patients can possess up to 6 ounces of cannabis.
9. Florida: Medical cannabis is legal, but recreational use is not. Patients can possess up to a 70-day supply of cannabis.
10.Georgia: Medical cannabis is legal in the form of low-THC oil. Patients can possess up to 20 fluid ounces of low-THC oil.
11.Hawaii: Medical cannabis is legal, but recreational use is not. Patients can possess up to 4 ounces of cannabis.
12. Idaho: Both medical and recreational cannabis are illegal.
13. Illinois: Both medical and recreational cannabis are legal. Medical patients can possess up to 2.5 ounces of cannabis every 14 days.
14. Indiana: Medical cannabis is legal in the form of low-THC oil. Patients can possess up to 20 fluid ounces of low-THC oil.
15. Iowa: Medical cannabis is legal in the form of low-THC oil. Patients can possess up to 4.5 grams of THC per 90 days.
16. Kansas: Both medical and recreational cannabis are illegal.
17. Kentucky: Medical cannabis is legal in the form of low-THC oil. Patients can possess up to 20 fluid ounces of low-THC oil.
18. Louisiana: Medical cannabis is legal, but recreational use is not. Patients can possess up to a 30-day supply of cannabis.
19. Maine: Both medical and recreational cannabis are legal. Medical patients can possess up to 2.5 ounces of cannabis.
20. Maryland: Both medical and recreational cannabis are legal. Medical patients can possess up to 120 grams of cannabis.
21. Massachusetts: Both medical and recreational cannabis are legal. Medical patients can possess up to a 60-day supply of cannabis.
22. Michigan: Both medical and recreational cannabis are legal. Medical patients can possess up to 2.5 ounces of cannabis.
23.Minnesota: Medical cannabis is legal, but recreational use is not. Patients can possess up to a 30-day supply of cannabis.
24.Mississippi: Medical cannabis is legal, but recreational use is not. Patients can possess up to 2.5 ounces of cannabis every 14 days.
25.Missouri: Both medical and recreational cannabis are legal. Medical patients can possess up to 4 ounces of cannabis.
26. Montana: Both medical and recreational cannabis are legal. Medical patients can possess up to 1 ounce of cannabis.
27.Nebraska: Both medical and recreational cannabis are illegal.
28.Nevada: Both medical and recreational cannabis are legal. Medical patients can possess up to 2.5 ounces of cannabis every 14 days.
29.New Hampshire: Medical cannabis is legal, but recreational use is not. Patients can possess up to 2 ounces of cannabis.
30.New Jersey: Both medical and recreational cannabis are legal. Medical patients can possess up to 3 ounces of cannabis every 30 days.
31.New Mexico: Both medical and recreational cannabis are legal. Medical patients can possess up to 8 ounces of cannabis every 90 days.
32. New York: Both medical and recreational cannabis are legal. Medical patients can possess a 30-day supply of non-smokable cannabis.
33.North Carolina: Both medical and recreational cannabis are illegal.
34. North Dakota: Medical cannabis is legal, but recreational use is not. Patients can possess up to 3 ounces of cannabis.
35. Ohio: Medical cannabis is legal, but recreational use is not. Patients can possess up to a 90-day supply of cannabis.
36. Oklahoma: Medical cannabis is legal, but recreational use is not. Patients can possess up to 3 ounces of cannabis.
37.Oregon: Both medical and recreational cannabis are legal. Medical patients can possess up to 24 ounces of cannabis.
38.Pennsylvania: Medical cannabis is legal, but recreational use is not. Patients can possess up to a 30-day supply of cannabis.
39. Rhode Island: Both medical and recreational cannabis are legal. Medical patients can possess up to 2.5 ounces of cannabis.
40. South Carolina: Both medical and recreational cannabis are illegal.
41. South Dakota: Medical cannabis is legal, but recreational use is not. Patients can possess up to 3 ounces of cannabis.
42. Tennessee: Both medical and recreational cannabis are illegal.
43. Texas: Medical cannabis is legal in the form of low-THC oil. Patients can possess up to 20 fluid ounces of low-THC oil.
44. Utah: Medical cannabis is legal, but recreational use is not. Patients can possess up to a 30-day supply of cannabis.
45. Vermont: Both medical and recreational cannabis are legal. Medical patients can possess up to 2 ounces of cannabis.
46.Virginia: Both medical and recreational cannabis are legal. Medical patients can possess up to 4 ounces of cannabis every 30 days.
47. Washington: Both medical and recreational cannabis are legal. Medical patients can possess up to 3 ounces of cannabis.
48. West Virginia: Medical cannabis is legal, but recreational use is not. Patients can possess up to a 30-day supply of cannabis.
49. Wisconsin: Both medical and recreational cannabis are illegal.
50. Wyoming: Both medical and recreational cannabis are illegal.

For more detailed information, you can check out resources like  DISA https://disa.com/marijuana-legality-by-state) and MyCannabis https://www.mycannabis.com/legal/