Answer:
"Most bewildering," "small white bulb"
Explanation:
I found the answer by using answer elimination. For "most bewildering," we can see that Muir is questioning the flower and looking at it carefully. This is a step of the scientific method, asking questions and making observations.
As for "bed of yellow mosses," I found this to be written in a more poetic way. This is a metaphor, saying the moss is a 'bed of moss.' There is definitely nothing scientific about that observation.
"Small white bulb" is descriptive. There is nothing fancy or exciting about that phrase, it is simply describing it the way it is, much as a scientist would. It sounds to me like a passage from a book on botany.
When I read "utmost simple purity," I found this as a somewhat religious observation. If not, it would surely be a poetic attempt, to romanticize the flower.
"Cried for joy" would not be a scientific observation. Never have I heard a researcher state that they cried for joy upon realizing that the effects of too much caffeine cause hallucinations. This would be a distraction from the study and has no place except in a seperate interview.
Hope this helps!